mirror of
https://github.com/torvalds/linux.git
synced 2024-12-28 05:41:55 +00:00
dd689ed5aa
857 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
2d338201d5 |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:
"147 patches, based on
|
||
Lukas Bulwahn
|
6fe26259b4 |
Kconfig.debug: drop selecting non-existing HARDLOCKUP_DETECTOR_ARCH
Commit |
||
Daniel Latypov
|
36f33b5629 |
lib/test: convert test_sort.c to use KUnit
This follows up commit |
||
Geert Uytterhoeven
|
8ba739ede4 |
math: RATIONAL_KUNIT_TEST should depend on RATIONAL instead of selecting it
RATIONAL_KUNIT_TEST selects RATIONAL, thus enabling an optional feature
the user may not want to have enabled. Fix this by making the test depend
on RATIONAL instead.
Link: https://lkml.kernel.org/r/20210706100945.3803694-3-geert@linux-m68k.org
Fixes:
|
||
|
Linus Torvalds
|
b250e6d141 |
Kbuild updates for v5.15
- Add -s option (strict mode) to merge_config.sh to make it fail when
any symbol is redefined.
- Show a warning if a different compiler is used for building external
modules.
- Infer --target from ARCH for CC=clang to let you cross-compile the
kernel without CROSS_COMPILE.
- Make the integrated assembler default (LLVM_IAS=1) for CC=clang.
- Add <linux/stdarg.h> to the kernel source instead of borrowing
<stdarg.h> from the compiler.
- Add Nick Desaulniers as a Kbuild reviewer.
- Drop stale cc-option tests.
- Fix the combination of CONFIG_TRIM_UNUSED_KSYMS and CONFIG_LTO_CLANG
to handle symbols in inline assembly.
- Show a warning if 'FORCE' is missing for if_changed rules.
- Various cleanups
-----BEGIN PGP SIGNATURE-----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=lw3M
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Add -s option (strict mode) to merge_config.sh to make it fail when
any symbol is redefined.
- Show a warning if a different compiler is used for building external
modules.
- Infer --target from ARCH for CC=clang to let you cross-compile the
kernel without CROSS_COMPILE.
- Make the integrated assembler default (LLVM_IAS=1) for CC=clang.
- Add <linux/stdarg.h> to the kernel source instead of borrowing
<stdarg.h> from the compiler.
- Add Nick Desaulniers as a Kbuild reviewer.
- Drop stale cc-option tests.
- Fix the combination of CONFIG_TRIM_UNUSED_KSYMS and CONFIG_LTO_CLANG
to handle symbols in inline assembly.
- Show a warning if 'FORCE' is missing for if_changed rules.
- Various cleanups
* tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (39 commits)
kbuild: redo fake deps at include/ksym/*.h
kbuild: clean up objtool_args slightly
modpost: get the *.mod file path more simply
checkkconfigsymbols.py: Fix the '--ignore' option
kbuild: merge vmlinux_link() between ARCH=um and other architectures
kbuild: do not remove 'linux' link in scripts/link-vmlinux.sh
kbuild: merge vmlinux_link() between the ordinary link and Clang LTO
kbuild: remove stale *.symversions
kbuild: remove unused quiet_cmd_update_lto_symversions
gen_compile_commands: extract compiler command from a series of commands
x86: remove cc-option-yn test for -mtune=
arc: replace cc-option-yn uses with cc-option
s390: replace cc-option-yn uses with cc-option
ia64: move core-y in arch/ia64/Makefile to arch/ia64/Kbuild
sparc: move the install rule to arch/sparc/Makefile
security: remove unneeded subdir-$(CONFIG_...)
kbuild: sh: remove unused install script
kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y
kbuild: Switch to 'f' variants of integrated assembler flag
kbuild: Shuffle blank line to improve comment meaning
...
|
||
Nick Desaulniers
|
7d73c3e9c5 |
Makefile: remove stale cc-option checks
cc-option, cc-option-yn, and cc-disable-warning all invoke the compiler during build time, and can slow down the build when these checks become stale for our supported compilers, whose minimally supported versions increases over time. See Documentation/process/changes.rst for the current supported minimal versions (GCC 4.9+, clang 10.0.1+). Compiler version support for these flags may be verified on godbolt.org. The following flags are GCC only and supported since at least GCC 4.9. Remove cc-option and cc-disable-warning tests. * -fno-tree-loop-im * -Wno-maybe-uninitialized * -fno-reorder-blocks * -fno-ipa-cp-clone * -fno-partial-inlining * -femit-struct-debug-baseonly * -fno-inline-functions-called-once * -fconserve-stack The following flags are supported by all supported versions of GCC and Clang. Remove their cc-option, cc-option-yn, and cc-disable-warning tests. * -fno-delete-null-pointer-checks * -fno-var-tracking * -Wno-array-bounds The following configs are made dependent on GCC, since they use GCC specific flags. * READABLE_ASM * DEBUG_SECTION_MISMATCH -mfentry was not supported by s390-linux-gnu-gcc until gcc-9+, add a comment. --param=allow-store-data-races=0 was renamed to -fno-allow-store-data-races in the GCC 10 release; add a comment. -Wmaybe-uninitialized (GCC specific) was being added for CONFIG_GCOV, then again unconditionally; add it only once. Also, base RETPOLINE_CFLAGS and RETPOLINE_VDSO_CFLAGS on CONFIC_CC_IS_* then remove cc-option tests for Clang. Link: https://github.com/ClangBuiltLinux/linux/issues/1436 Acked-by: Miguel Ojeda <ojeda@kernel.org> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> |
||
|
Linus Torvalds
|
a2d616b935 |
parisc architecture updates for kernel 5.15:
- Fix a kernel crash when a signal is delivered to bad userspace stack - Fix fall-through warnings in math-emu code - Increase size of gcc stack frame check - Switch coding from 'pci_' to 'dma_' API - Make struct parisc_driver::remove() return void - Some parisc related Makefile changes - Minor cleanups, e.g. change to octal permissions, fix macro collisions, fix PMD_ORDER collision, replace spaces with tabs -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQS86RI+GtKfB8BJu973ErUQojoPXwUCYTELwQAKCRD3ErUQojoP Xy/uAQChkDVD15kBvj0PUt4hDpGq7ryfAsEfMnxlV2k4Ue6SKAEA3Smfd242lpPF f89NNo6Y/ZhO+aWKfOLerXLfM6sB2QQ= =cxvN -----END PGP SIGNATURE----- Merge tag 'for-5.15/parisc' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc architecture updates from Helge Deller: - Fix a kernel crash when a signal is delivered to bad userspace stack - Fix fall-through warnings in math-emu code - Increase size of gcc stack frame check - Switch coding from 'pci_' to 'dma_' API - Make struct parisc_driver::remove() return void - Some parisc related Makefile changes - Minor cleanups, e.g. change to octal permissions, fix macro collisions, fix PMD_ORDER collision, replace spaces with tabs * tag 'for-5.15/parisc' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: math-emu: Fix fall-through warnings parisc: fix crash with signals and alloca parisc: Fix compile failure when building 64-bit kernel natively parisc: ccio-dma.c: Added tab instead of spaces parisc/parport_gsc: switch from 'pci_' to 'dma_' API parisc: move core-y in arch/parisc/Makefile to arch/parisc/Kbuild parisc: switch from 'pci_' to 'dma_' API parisc: Make struct parisc_driver::remove() return void parisc: remove unused arch/parisc/boot/install.sh and its phony target parisc: Rename PMD_ORDER to PMD_TABLE_ORDER parisc: math-emu: Avoid "fmt" macro collision parisc: Increase size of gcc stack frame check parisc: Replace symbolic permissions with octal permissions |
||
|
Linus Torvalds
|
8bda955776 |
New features:
- Support for server-side disconnect injection via debugfs - Protocol definitions for new RPC_AUTH_TLS authentication flavor Performance improvements: - Reduce page allocator traffic in the NFSD splice read actor - Reduce CPU utilization in svcrdma's Send completion handler Notable bug fixes: - Stabilize lockd operation when re-exporting NFS mounts - Fix the use of %.*s in NFSD tracepoints - Fix /proc/sys/fs/nfs/nsm_use_hostnames -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmEqq0AACgkQM2qzM29m f5dYig/5AaPN2BWYf4D1VkrAS3+zGS+3IN23WVgpbA54jgfjPEH+Aa00YhEQQa0j Y5u/jE5g/tWvenDefq5BmvdRfZMWCVc2JkngctOSflhaREUWK+HgCkH+5DQs6zUM rbX7qy0v6wJnEMSlwCKJ2AuZbYw7Bsg2nvOgEbb718/ent3umeoXEK09x3HTWLEp eVcMU5uicB5wRRPpROYG792oWzUScQ8kyiRCKJfQDoR7bINhBeVHObAIFMBo1UaH x9CMX4RlPYGmoMYUc+AqcOM7hizucHpXqM1r3oVjQ7FyI+pmDLuLL/3OTjtRUX7+ nYLqNW/PijH9PjFe4BPjGHAUQfKiTIXANAe8VdjQj70D40jYkP+jQ9SPdV+pEgi4 U4azfK3S+85/bRYYq/1alcLiP1+6dgcL++rVvnKESTH9NRgNoEw2WZHeKxXiYaxU p7oOC4XdnYDwcz/3QVWa0sK2kA5IJHzOsCQR7OilD09NAJ+AbJTAp0H3xFXTllzb AV2CAEBVZlP+pZYOehuVnKpZPa7YAWx92wRK2anbRUMZN3lF1wWBEOTd6KweIpTx l2GJSf3GWBqL1x9PjSet/cBusxYjTA+S1hE7KMrsNPhzbvpIgAZEtSqOfn9apDCV uAFIN2DSiHm3Tv0aFSJWo+CMyKkyktuiS8JFKaFdzCp9NtsBM2M= =TGkK -----END PGP SIGNATURE----- Merge tag 'nfsd-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux Pull nfsd updates from Chuck Lever: "New features: - Support for server-side disconnect injection via debugfs - Protocol definitions for new RPC_AUTH_TLS authentication flavor Performance improvements: - Reduce page allocator traffic in the NFSD splice read actor - Reduce CPU utilization in svcrdma's Send completion handler Notable bug fixes: - Stabilize lockd operation when re-exporting NFS mounts - Fix the use of %.*s in NFSD tracepoints - Fix /proc/sys/fs/nfs/nsm_use_hostnames" * tag 'nfsd-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (31 commits) nfsd: fix crash on LOCKT on reexported NFSv3 nfs: don't allow reexport reclaims lockd: don't attempt blocking locks on nfs reexports nfs: don't atempt blocking locks on nfs reexports Keep read and write fds with each nlm_file lockd: update nlm_lookup_file reexport comment nlm: minor refactoring nlm: minor nlm_lookup_file argument change lockd: lockd server-side shouldn't set fl_ops SUNRPC: Add documentation for the fail_sunrpc/ directory SUNRPC: Server-side disconnect injection SUNRPC: Move client-side disconnect injection SUNRPC: Add a /sys/kernel/debug/fail_sunrpc/ directory svcrdma: xpt_bc_xprt is already clear in __svc_rdma_free() nfsd4: Fix forced-expiry locking rpc: fix gss_svc_init cleanup on failure SUNRPC: Add RPC_AUTH_TLS protocol numbers lockd: change the proc_handler for nsm_use_hostnames sysctl: introduce new proc handler proc_dobool SUNRPC: Fix a NULL pointer deref in trace_svc_stats_latency() ... |
||
|
Linus Torvalds
|
679369114e |
for-5.15/block-2021-08-30
-----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAmEs6H0QHGF4Ym9lQGtl cm5lbC5kawAKCRD301j7KXHgpukbD/9Qk9fQte+WJVmpbdvhV40gcKBVnGOVH0ke k+36x6AB/gWKnFHwtprsSyVqPxmzqwTv9VIq5l/s3Vydt3L61znvTneBeN03Wlkn UTxD0lY8HzyVWnZb82LBBjjy7cs6EzrFG4kBH/ZiTAyTcBsCAvzo5J7mywb4gFjj L/HeBq58EJ3WCUlxlVW1ijctvi7wnGoaH5bZY1TE00GGT6TysN2bEPfzjkuYHrDz RqhoQdWPLDz6h3x9lAncPw2MWlcmlGvJ96ABseAKFPKvXxE2PzgolSoQfVUUJtko bqGyy2ns+pxN11SrcGYjogEKVKhONoms/5UN1RtwRBVsgvecxlHER/SgyZ8luBDo lFhVXulkSjpswbWutRy3USge98GwMu2Z4ppP2CDmO7hkQd0DF8sL0kPKyaREkcHi NmsD/0zF2uUhUVN+PRC/MuzngAmL4Mmxjk70L+MohlK7e+H3pnEo1ec3OMcXe+wB dG6t/BFD9bYmj0UjsHeXEoR/iRuvSba1L8zBz5dhRaHH6DvdycYhpynXWWlU3C8K 3nzEVVpcDINMsiRl1Vqb6g6HsMwHIH84FRl7Mc51UmhW9C4gLfWMCt1guQuzOj72 yEbmCLydE/FR2IUPY7eqX8hRG8GTUlMtSvGdgnvBOcWj+K3buT/c5yVTHgTrN8ox LCOXHSvV6w== =S8fs -----END PGP SIGNATURE----- Merge tag 'for-5.15/block-2021-08-30' of git://git.kernel.dk/linux-block Pull block updates from Jens Axboe: "Nothing major in here - lots of good cleanups and tech debt handling, which is also evident in the diffstats. In particular: - Add disk sequence numbers (Matteo) - Discard merge fix (Ming) - Relax disk zoned reporting restrictions (Niklas) - Bio error handling zoned leak fix (Pavel) - Start of proper add_disk() error handling (Luis, Christoph) - blk crypto fix (Eric) - Non-standard GPT location support (Dmitry) - IO priority improvements and cleanups (Damien)o - blk-throtl improvements (Chunguang) - diskstats_show() stack reduction (Abd-Alrhman) - Loop scheduler selection (Bart) - Switch block layer to use kmap_local_page() (Christoph) - Remove obsolete disk_name helper (Christoph) - block_device refcounting improvements (Christoph) - Ensure gendisk always has a request queue reference (Christoph) - Misc fixes/cleanups (Shaokun, Oliver, Guoqing)" * tag 'for-5.15/block-2021-08-30' of git://git.kernel.dk/linux-block: (129 commits) sg: pass the device name to blk_trace_setup block, bfq: cleanup the repeated declaration blk-crypto: fix check for too-large dun_bytes blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN blk-zoned: allow zone management send operations without CAP_SYS_ADMIN block: mark blkdev_fsync static block: refine the disk_live check in del_gendisk mmc: sdhci-tegra: Enable MMC_CAP2_ALT_GPT_TEGRA mmc: block: Support alternative_gpt_sector() operation partitions/efi: Support non-standard GPT location block: Add alternative_gpt_sector() operation bio: fix page leak bio_add_hw_page failure block: remove CONFIG_DEBUG_BLOCK_EXT_DEVT block: remove a pointless call to MINOR() in device_add_disk null_blk: add error handling support for add_disk() virtio_blk: add error handling support for add_disk() block: add error handling for device_add_disk / add_disk block: return errors from disk_alloc_events block: return errors from blk_integrity_add block: call blk_register_queue earlier in device_add_disk ... |
||
Helge Deller
|
55b70eed81 |
parisc: Increase size of gcc stack frame check
parisc uses much bigger frames than other architectures, so increase the stack frame check value to avoid compiler warnings. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Helge Deller <deller@gmx.de> |
||
Christoph Hellwig
|
c4b2b7d150 |
block: remove CONFIG_DEBUG_BLOCK_EXT_DEVT
This might have been a neat debug aid when the extended dev_t was added, but that time is long gone. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20210824075216.1179406-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk> |
||
Chuck Lever
|
c782af2500 |
SUNRPC: Add a /sys/kernel/debug/fail_sunrpc/ directory
This directory will contain a set of administrative controls for enabling error injection for kernel RPC consumers. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> |
||
Thomas Gleixner
|
bb630f9f7a |
locking/rtmutex: Add mutex variant for RT
Add the necessary defines, helpers and API functions for replacing struct mutex on a PREEMPT_RT enabled kernel with an rtmutex based variant. No functional change when CONFIG_PREEMPT_RT=n Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20210815211305.081517417@linutronix.de |
||
Matteo Croce
|
b2ff70a01a |
lib/test_string.c: move string selftest in the Runtime Testing menu
STRING_SELFTEST is presented in the "Library routines" menu. Move it in Kernel hacking > Kernel Testing and Coverage > Runtime Testing together with other similar tests found in lib/ --- Runtime Testing <*> Test functions located in the hexdump module at runtime <*> Test string functions (NEW) <*> Test functions located in the string_helpers module at runtime <*> Test strscpy*() family of functions at runtime <*> Test kstrto*() family of functions at runtime <*> Test printf() family of functions at runtime <*> Test scanf() family of functions at runtime Link: https://lkml.kernel.org/r/20210719185158.190371-1-mcroce@linux.microsoft.com Signed-off-by: Matteo Croce <mcroce@microsoft.com> Cc: Peter Rosin <peda@axentia.se> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
Mel Gorman
|
6bce244390 |
mm/page_alloc: Revert pahole zero-sized workaround
Commit |
||
|
Linus Torvalds
|
81361b837a |
Kbuild updates for v5.14
- Increase the -falign-functions alignment for the debug option.
- Remove ugly libelf checks from the top Makefile.
- Make the silent build (-s) more silent.
- Re-compile the kernel if KBUILD_BUILD_TIMESTAMP is specified.
- Various script cleanups
-----BEGIN PGP SIGNATURE-----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=Za8V
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Increase the -falign-functions alignment for the debug option.
- Remove ugly libelf checks from the top Makefile.
- Make the silent build (-s) more silent.
- Re-compile the kernel if KBUILD_BUILD_TIMESTAMP is specified.
- Various script cleanups
* tag 'kbuild-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (27 commits)
scripts: add generic syscallnr.sh
scripts: check duplicated syscall number in syscall table
sparc: syscalls: use pattern rules to generate syscall headers
parisc: syscalls: use pattern rules to generate syscall headers
nds32: add arch/nds32/boot/.gitignore
kbuild: mkcompile_h: consider timestamp if KBUILD_BUILD_TIMESTAMP is set
kbuild: modpost: Explicitly warn about unprototyped symbols
kbuild: remove trailing slashes from $(KBUILD_EXTMOD)
kconfig.h: explain IS_MODULE(), IS_ENABLED()
kconfig: constify long_opts
scripts/setlocalversion: simplify the short version part
scripts/setlocalversion: factor out 12-chars hash construction
scripts/setlocalversion: add more comments to -dirty flag detection
scripts/setlocalversion: remove workaround for old make-kpkg
scripts/setlocalversion: remove mercurial, svn and git-svn supports
kbuild: clean up ${quiet} checks in shell scripts
kbuild: sink stdout from cmd for silent build
init: use $(call cmd,) for generating include/generated/compile.h
kbuild: merge scripts/mkmakefile to top Makefile
sh: move core-y in arch/sh/Makefile to arch/sh/Kbuild
...
|
||
Stephen Boyd
|
22f4e66df7 |
dump_stack: add vmlinux build ID to stack traces
Add the running kernel's build ID[1] to the stacktrace information header. This makes it simpler for developers to locate the vmlinux with full debuginfo for a particular kernel stacktrace. Combined with scripts/decode_stracktrace.sh, a developer can download the correct vmlinux from a debuginfod[2] server and find the exact file and line number for the functions plus offsets in a stacktrace. This is especially useful for pstore crash debugging where the kernel crashes are recorded in the pstore logs and the recovery kernel is different or the debuginfo doesn't exist on the device due to space concerns (the data can be large and a security concern). The stacktrace can be analyzed after the crash by using the build ID to find the matching vmlinux and understand where in the function something went wrong. Example stacktrace from lkdtm: WARNING: CPU: 4 PID: 3255 at drivers/misc/lkdtm/bugs.c:83 lkdtm_WARNING+0x28/0x30 [lkdtm] Modules linked in: lkdtm rfcomm algif_hash algif_skcipher af_alg xt_cgroup uinput xt_MASQUERADE CPU: 4 PID: 3255 Comm: bash Not tainted 5.11 #3 aa23f7a1231c229de205662d5a9e0d4c580f19a1 Hardware name: Google Lazor (rev3+) with KB Backlight (DT) pstate: 00400009 (nzcv daif +PAN -UAO -TCO BTYPE=--) pc : lkdtm_WARNING+0x28/0x30 [lkdtm] The hex string aa23f7a1231c229de205662d5a9e0d4c580f19a1 is the build ID, following the kernel version number. Put it all behind a config option, STACKTRACE_BUILD_ID, so that kernel developers can remove this information if they decide it is too much. Link: https://lkml.kernel.org/r/20210511003845.2429846-5-swboyd@chromium.org Link: https://fedoraproject.org/wiki/Releases/FeatureBuildId [1] Link: https://sourceware.org/elfutils/Debuginfod.html [2] Signed-off-by: Stephen Boyd <swboyd@chromium.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Jessica Yu <jeyu@kernel.org> Cc: Evan Green <evgreen@chromium.org> Cc: Hsin-Yi Wang <hsinyi@chromium.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dave Young <dyoung@redhat.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Sasha Levin <sashal@kernel.org> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
Zhen Lei
|
9dbbc3b9d0 |
lib: fix spelling mistakes
Fix some spelling mistakes in comments: permanentely ==> permanently wont ==> won't remaning ==> remaining succed ==> succeed shouldnt ==> shouldn't alpha-numeric ==> alphanumeric storeing ==> storing funtion ==> function documenation ==> documentation Determin ==> Determine intepreted ==> interpreted ammount ==> amount obious ==> obvious interupts ==> interrupts occured ==> occurred asssociated ==> associated taking into acount ==> taking into account squence ==> sequence stil ==> still contiguos ==> contiguous matchs ==> matches Link: https://lkml.kernel.org/r/20210607072555.12416-1-thunder.leizhen@huawei.com Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Reviewed-by: Jacob Keller <jacob.e.keller@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Linus Torvalds
|
a48ad6e7a3 |
linux-kselftest-kunit-fixes-5.14-rc1
This KUnit update for Linux 5.14-rc1 consists of fixes and features: -- add support for skipped tests -- introduce kunit_kmalloc_array/kunit_kcalloc() helpers -- add gnu_printf specifiers -- add kunit_shutdown -- add unit test for filtering suites by names -- convert lib/test_list_sort.c to use KUnit -- code organization moving default config to tools/testing/kunit -- refactor of internal parser input handling -- cleanups and updates to documentation -- code cleanup related to casts -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEPZKym/RZuOCGeA/kCwJExA0NQxwFAmDfNHgACgkQCwJExA0N QxzU5g/+ORbcbE5jhumo82xYUCGTScgIqPllNO000Vk9xydMqwx6tpY5puV0ig2z 5X7pxKEQTnype58yzY5mS1p336ryIx3q+AwEownxTW3YurXo2naQ59ZPjEvlAV+E h+DMYLzEjrxzcyJATw02uC9YLUZ3w6FPJfiXViIv93YYrtcnM0u6JpwG0yfBlI4v 4KKB2Xu4K7T90C9/ADFYFKX3mjXQl5fQwvIdtA7wS90Cgq52LKp2mvg1XEiZE5d+ 0dkTZ4Zo8TxxHt665o7vfnUjQQNmh45iGlW65wONxfAPb8BPoneGjVKWQTnN0Hor W+93ZPbMuFMSSKJuoHY9U7sP5VySKvaiIYaGdi6prnZZu0zUabKnLZ6FOy7kEdfs v09ulCBTVLslixVgNcp/kD9T+G/SXwCF5YBMAiMDQ0GNfUqlFtBkEA3gd44KwMI0 KwCcOgUSiaCkqyzOz/VeQsu/nhA5jdMO0KjiAs7Z3e7r7O/qKFs/ll7hZgDNCWSC q8eIrcBkSL0EGgXR1iZ4AtGm8op6KKd4ACBM8NdtTyoGFl1npZOgZnHoIsy35G9K 9mhc7eXSoaDGqy9dONL1Tc8Neg7qLTXQNp2radqsnAAgNPUrJuC7+8YC+DdIsjBH W7OyMjpfbwPws5rP4CS+JdwL+nQprKXZvFIhWGYhkDK44MbOngw= =5QAv -----END PGP SIGNATURE----- Merge tag 'linux-kselftest-kunit-fixes-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull KUnit update from Shuah Khan: "Fixes and features: - add support for skipped tests - introduce kunit_kmalloc_array/kunit_kcalloc() helpers - add gnu_printf specifiers - add kunit_shutdown - add unit test for filtering suites by names - convert lib/test_list_sort.c to use KUnit - code organization moving default config to tools/testing/kunit - refactor of internal parser input handling - cleanups and updates to documentation - code cleanup related to casts" * tag 'linux-kselftest-kunit-fixes-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (29 commits) kunit: add unit test for filtering suites by names kasan: test: make use of kunit_skip() kunit: test: Add example tests which are always skipped kunit: tool: Support skipped tests in kunit_tool kunit: Support skipped tests thunderbolt: test: Reinstate a few casts of bitfields kunit: tool: internal refactor of parser input handling lib/test: convert lib/test_list_sort.c to use KUnit kunit: introduce kunit_kmalloc_array/kunit_kcalloc() helpers kunit: Remove the unused all_tests.config kunit: Move default config from arch/um -> tools/testing/kunit kunit: arch/um/configs: Enable KUNIT_ALL_TESTS by default kunit: Add gnu_printf specifiers lib/cmdline_kunit: Remove a cast which are no-longer required kernel/sysctl-test: Remove some casts which are no-longer required thunderbolt: test: Remove some casts which are no longer required mmc: sdhci-of-aspeed: Remove some unnecessary casts from KUnit tests iio: Remove a cast in iio-test-format which is no longer required device property: Remove some casts in property-entry-test Documentation: kunit: Clean up some string casts in examples ... |
||
|
Linus Torvalds
|
71bd934101 |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton: "190 patches. Subsystems affected by this patch series: mm (hugetlb, userfaultfd, vmscan, kconfig, proc, z3fold, zbud, ras, mempolicy, memblock, migration, thp, nommu, kconfig, madvise, memory-hotplug, zswap, zsmalloc, zram, cleanups, kfence, and hmm), procfs, sysctl, misc, core-kernel, lib, lz4, checkpatch, init, kprobes, nilfs2, hfs, signals, exec, kcov, selftests, compress/decompress, and ipc" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (190 commits) ipc/util.c: use binary search for max_idx ipc/sem.c: use READ_ONCE()/WRITE_ONCE() for use_global_lock ipc: use kmalloc for msg_queue and shmid_kernel ipc sem: use kvmalloc for sem_undo allocation lib/decompressors: remove set but not used variabled 'level' selftests/vm/pkeys: exercise x86 XSAVE init state selftests/vm/pkeys: refill shadow register after implicit kernel write selftests/vm/pkeys: handle negative sys_pkey_alloc() return code selftests/vm/pkeys: fix alloc_random_pkey() to make it really, really random kcov: add __no_sanitize_coverage to fix noinstr for all architectures exec: remove checks in __register_bimfmt() x86: signal: don't do sas_ss_reset() until we are certain that sigframe won't be abandoned hfsplus: report create_date to kstat.btime hfsplus: remove unnecessary oom message nilfs2: remove redundant continue statement in a while-loop kprobes: remove duplicated strong free_insn_page in x86 and s390 init: print out unknown kernel parameters checkpatch: do not complain about positive return values starting with EPOLL checkpatch: improve the indented label test checkpatch: scripts/spdxcheck.py now requires python3 ... |
||
Trent Piepho
|
b6c75c4afc |
lib/math/rational: add Kunit test cases
Adds a number of test cases that cover a range of possible code paths. [akpm@linux-foundation.org: remove non-ascii characters, fix whitespace] [colin.king@canonical.com: fix spelling mistake "demominator" -> "denominator"] Link: https://lkml.kernel.org/r/20210526085049.6393-1-colin.king@canonical.com Link: https://lkml.kernel.org/r/20210525144250.214670-2-tpiepho@gmail.com Signed-off-by: Trent Piepho <tpiepho@gmail.com> Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Daniel Latypov <dlatypov@google.com> Cc: Oskar Schirmer <oskar@scara.com> Cc: Yiyuan Guo <yguoaz@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Linus Torvalds
|
65090f30ab |
Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton: "191 patches. Subsystems affected by this patch series: kthread, ia64, scripts, ntfs, squashfs, ocfs2, kernel/watchdog, and mm (gup, pagealloc, slab, slub, kmemleak, dax, debug, pagecache, gup, swap, memcg, pagemap, mprotect, bootmem, dma, tracing, vmalloc, kasan, initialization, pagealloc, and memory-failure)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (191 commits) mm,hwpoison: make get_hwpoison_page() call get_any_page() mm,hwpoison: send SIGBUS with error virutal address mm/page_alloc: split pcp->high across all online CPUs for cpuless nodes mm/page_alloc: allow high-order pages to be stored on the per-cpu lists mm: replace CONFIG_FLAT_NODE_MEM_MAP with CONFIG_FLATMEM mm: replace CONFIG_NEED_MULTIPLE_NODES with CONFIG_NUMA docs: remove description of DISCONTIGMEM arch, mm: remove stale mentions of DISCONIGMEM mm: remove CONFIG_DISCONTIGMEM m68k: remove support for DISCONTIGMEM arc: remove support for DISCONTIGMEM arc: update comment about HIGHMEM implementation alpha: remove DISCONTIGMEM and NUMA mm/page_alloc: move free_the_page mm/page_alloc: fix counting of managed_pages mm/page_alloc: improve memmap_pages dbg msg mm: drop SECTION_SHIFT in code comments mm/page_alloc: introduce vm.percpu_pagelist_high_fraction mm/page_alloc: limit the number of pages on PCP lists when reclaim is active mm/page_alloc: scale the number of pages that are batch freed ... |
||
|
Linus Torvalds
|
a941a0349c |
-----BEGIN PGP SIGNATURE-----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=5Hb8
-----END PGP SIGNATURE-----
Merge tag 'timers-core-2021-06-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
"Time and clocksource/clockevent related updates:
Core changes:
- Infrastructure to support per CPU "broadcast" devices for per CPU
clockevent devices which stop in deep idle states. This allows us
to utilize the more efficient architected timer on certain ARM SoCs
for normal operation instead of permanentely using the slow to
access SoC specific clockevent device.
- Print the name of the broadcast/wakeup device in /proc/timer_list
- Make the clocksource watchdog more robust against delays between
reading the current active clocksource and the watchdog
clocksource. Such delays can be caused by NMIs, SMIs and vCPU
preemption.
Handle this by reading the watchdog clocksource twice, i.e. before
and after reading the current active clocksource. In case that the
two watchdog reads shows an excessive time delta, the read sequence
is repeated up to 3 times.
- Improve the debug output and add a test module for the watchdog
mechanism.
- Reimplementation of the venerable time64_to_tm() function with a
faster and significantly smaller version. Straight from the source,
i.e. the author of the related research paper contributed this!
Driver changes:
- No new drivers, not even new device tree bindings!
- Fixes, improvements and cleanups and all over the place"
* tag 'timers-core-2021-06-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
time/kunit: Add missing MODULE_LICENSE()
time: Improve performance of time64_to_tm()
clockevents: Use list_move() instead of list_del()/list_add()
clocksource: Print deviation in nanoseconds when a clocksource becomes unstable
clocksource: Provide kernel module to test clocksource watchdog
clocksource: Reduce clocksource-skew threshold
clocksource: Limit number of CPUs checked for clock synchronization
clocksource: Check per-CPU clock synchronization when marked unstable
clocksource: Retry clock read if long delays detected
clockevents: Add missing parameter documentation
clocksource/drivers/timer-ti-dm: Drop unnecessary restore
clocksource/arm_arch_timer: Improve Allwinner A64 timer workaround
clocksource/drivers/arm_global_timer: Remove duplicated argument in arm_global_timer
clocksource/drivers/arm_global_timer: Make symbol 'gt_clk_rate_change_nb' static
arm: zynq: don't disable CONFIG_ARM_GLOBAL_TIMER due to CONFIG_CPU_FREQ anymore
clocksource/drivers/arm_global_timer: Implement rate compensation whenever source clock changes
clocksource/drivers/ingenic: Rename unreasonable array names
clocksource/drivers/timer-ti-dm: Save and restore timer TIOCP_CFG
clocksource/drivers/mediatek: Ack and disable interrupts on suspend
clocksource/drivers/samsung_pwm: Constify source IO memory
...
|
||
|
Linus Torvalds
|
e563592c3e |
printk changes for 5.14
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEESH4wyp42V4tXvYsjUqAMR0iAlPIFAmDa2mEACgkQUqAMR0iA lPKBiBAAgvhNnaRVR6/GBVrv5jYM8obJM7PHPxp8dh+ZRb1mDyL1ZDU2r7lmQjMD ORBN5eK6pXk/gVabXR5lY0B7vQ8phJmYO98Lk2E3n9ZTgMkTHQ5WOHzBpt93gd/y l9m00ZD0YcHrkmM1fq73FuZVEMzPk85cjTe8n6JeHJgSAdoOY/rl61Cn57ZHFIa4 DkpdNGkJaf77UIWOc8NLAXOdSD9NxSGycHXpU0q8QO9UFq+Le2qN4OPj3S1CNCO2 ciy+VcW1VQ/BesPPlBIk3ImHWPS4ty3n4EYFzNm+saElIaWxyhNBXAvcBAK/x9LK 3QibfBFwbS3sllhnk96Z24UaWWMg2AygbV2aqd3xMLpW3XD6q/MVnWGHfayhnmYj aNcWpldIjwDH4iZJ5vnD4KewQpYp+Jc5Hqv6UyIf1O8nEvvQubrDXjSDLLcbZFI1 m2cs9DTc5ezyX/DifBsViDbw8hPjJg7QAbRjVk1EfVQrH090mRQoSoQQI4QtuMEi pPiTALNG1HRKIoYrKxQMB43JvZ1zjaSbtNbW4JJ9Bm3kxFZ/Oa8NXzE5BOjeykZm bCePtc018GZaGNW0z/Zr460c/Tuaj8fZSzUOj9Xnw5Hv4G3W5+5EqDy7sU/GTPjL It9rAZYo+cM9vp1BD2343YPZgnChWHaW0BF/WDqFAhLd9av/WKI= =Oa1c -----END PGP SIGNATURE----- Merge tag 'printk-for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux Pull printk updates from Petr Mladek: - Add %pt[RT]s modifier to vsprintf(). It overrides ISO 8601 separator by using ' ' (space). It produces "YYYY-mm-dd HH:MM:SS" instead of "YYYY-mm-ddTHH:MM:SS". - Correctly parse long row of numbers by sscanf() when using the field width. Add extensive sscanf() selftest. - Generalize re-entrant CPU lock that has already been used to serialize dump_stack() output. It is part of the ongoing printk rework. It will allow to remove the obsoleted printk_safe buffers and introduce atomic consoles. - Some code clean up and sparse warning fixes. * tag 'printk-for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: printk: fix cpu lock ordering lib/dump_stack: move cpu lock to printk.c printk: Remove trailing semicolon in macros random32: Fix implicit truncation warning in prandom_seed_state() lib: test_scanf: Remove pointless use of type_min() with unsigned types selftests: lib: Add wrapper script for test_scanf lib: test_scanf: Add tests for sscanf number conversion lib: vsprintf: Fix handling of number field widths in vsscanf lib: vsprintf: scanf: Negative number must have field width > 1 usb: host: xhci-tegra: Switch to use %ptTs nilfs2: Switch to use %ptTs kdb: Switch to use %ptTs lib/vsprintf: Allow to override ISO 8601 date and time separator |
||
|
Mel Gorman
|
dbbee9d5cd |
mm/page_alloc: convert per-cpu list protection to local_lock
There is a lack of clarity of what exactly local_irq_save/local_irq_restore protects in page_alloc.c . It conflates the protection of per-cpu page allocation structures with per-cpu vmstat deltas. This patch protects the PCP structure using local_lock which for most configurations is identical to IRQ enabling/disabling. The scope of the lock is still wider than it should be but this is decreased later. It is possible for the local_lock to be embedded safely within struct per_cpu_pages but it adds complexity to free_unref_page_list. [akpm@linux-foundation.org: coding style fixes] [mgorman@techsingularity.net: work around a pahole limitation with zero-sized struct pagesets] Link: https://lkml.kernel.org/r/20210526080741.GW30378@techsingularity.net [lkp@intel.com: Make pagesets static] Link: https://lkml.kernel.org/r/20210512095458.30632-3-mgorman@techsingularity.net Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
Oliver Glitta
|
1f9f78b1b3 |
mm/slub, kunit: add a KUnit test for SLUB debugging functionality
SLUB has resiliency_test() function which is hidden behind #ifdef SLUB_RESILIENCY_TEST that is not part of Kconfig, so nobody runs it. KUnit should be a proper replacement for it. Try changing byte in redzone after allocation and changing pointer to next free node, first byte, 50th byte and redzone byte. Check if validation finds errors. There are several differences from the original resiliency test: Tests create own caches with known state instead of corrupting shared kmalloc caches. The corruption of freepointer uses correct offset, the original resiliency test got broken with freepointer changes. Scratch changing random byte test, because it does not have meaning in this form where we need deterministic results. Add new option CONFIG_SLUB_KUNIT_TEST in Kconfig. Tests next_pointer, first_word and clobber_50th_byte do not run with KASAN option on. Because the test deliberately modifies non-allocated objects. Use kunit_resource to count errors in cache and silence bug reports. Count error whenever slab_bug() or slab_fix() is called or when the count of pages is wrong. [glittao@gmail.com: remove unused function test_exit(), from SLUB KUnit test] Link: https://lkml.kernel.org/r/20210512140656.12083-1-glittao@gmail.com [akpm@linux-foundation.org: export kasan_enable/disable_current to modules] Link: https://lkml.kernel.org/r/20210511150734.3492-2-glittao@gmail.com Signed-off-by: Oliver Glitta <glittao@gmail.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Daniel Latypov <dlatypov@google.com> Acked-by: Marco Elver <elver@google.com> Cc: Brendan Higgins <brendanhiggins@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Pekka Enberg <penberg@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Daniel Latypov
|
ebd09577be |
lib/test: convert lib/test_list_sort.c to use KUnit
Functionally, this just means that the test output will be slightly changed and it'll now depend on CONFIG_KUNIT=y/m. It'll still run at boot time and can still be built as a loadable module. There was a pre-existing patch to convert this test that I found later, here [1]. Compared to [1], this patch doesn't rename files and uses KUnit features more heavily (i.e. does more than converting pr_err() calls to KUNIT_FAIL()). What this conversion gives us: * a shorter test thanks to KUnit's macros * a way to run this a bit more easily via kunit.py (and CONFIG_KUNIT_ALL_TESTS=y) [2] * a structured way of reporting pass/fail * uses kunit-managed allocations to avoid the risk of memory leaks * more descriptive error messages: * i.e. it prints out which fields are invalid, what the expected values are, etc. What this conversion does not do: * change the name of the file (and thus the name of the module) * change the name of the config option Leaving these as-is for now to minimize the impact to people wanting to run this test. IMO, that concern trumps following KUnit's style guide for both names, at least for now. [1] https://lore.kernel.org/linux-kselftest/20201015014616.309000-1-vitor@massaru.org/ [2] Can be run via $ ./tools/testing/kunit/kunit.py run --kunitconfig /dev/stdin <<EOF CONFIG_KUNIT=y CONFIG_TEST_LIST_SORT=y EOF [16:55:56] Configuring KUnit Kernel ... [16:55:56] Building KUnit Kernel ... [16:56:29] Starting KUnit Kernel ... [16:56:32] ============================================================ [16:56:32] ======== [PASSED] list_sort ======== [16:56:32] [PASSED] list_sort_test [16:56:32] ============================================================ [16:56:32] Testing complete. 1 tests run. 0 failed. 0 crashed. [16:56:32] Elapsed time: 35.668s total, 0.001s configuring, 32.725s building, 0.000s running Note: the build time is as after a `make mrproper`. Signed-off-by: Daniel Latypov <dlatypov@google.com> Tested-by: David Gow <davidgow@google.com> Acked-by: Brendan Higgins <brendanhiggins@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> |
||
Paul E. McKenney
|
1253b9b87e |
clocksource: Provide kernel module to test clocksource watchdog
When the clocksource watchdog marks a clock as unstable, this might be due to that clock being unstable or it might be due to delays that happen to occur between the reads of the two clocks. It would be good to have a way of testing the clocksource watchdog's ability to distinguish between these two causes of clock skew and instability. Therefore, provide a new clocksource-wdtest module selected by a new TEST_CLOCKSOURCE_WATCHDOG Kconfig option. This module has a single module parameter named "holdoff" that provides the number of seconds of delay before testing should start, which defaults to zero when built as a module and to 10 seconds when built directly into the kernel. Very large systems that boot slowly may need to increase the value of this module parameter. This module uses hand-crafted clocksource structures to do its testing, thus avoiding messing up timing for the rest of the kernel and for user applications. This module first verifies that the ->uncertainty_margin field of the clocksource structures are set sanely. It then tests the delay-detection capability of the clocksource watchdog, increasing the number of consecutive delays injected, first provoking console messages complaining about the delays and finally forcing a clock-skew event. Unexpected test results cause at least one WARN_ON_ONCE() console splat. If there are no splats, the test has passed. Finally, it fuzzes the value returned from a clocksource to test the clocksource watchdog's ability to detect time skew. This module checks the state of its clocksource after each test, and uses WARN_ON_ONCE() to emit a console splat if there are any failures. This should enable all types of test frameworks to detect any such failures. This facility is intended for diagnostic use only, and should be avoided on production systems. Reported-by: Chris Mason <clm@fb.com> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Feng Tang <feng.tang@intel.com> Link: https://lore.kernel.org/r/20210527190124.440372-5-paulmck@kernel.org |
||
Randy Dunlap
|
b8e00abe7d |
locking/lockdep: Reduce LOCKDEP dependency list
Some arches (um, sparc64, riscv, xtensa) cause a Kconfig warning for
LOCKDEP.
These arch-es select LOCKDEP_SUPPORT but they are not listed as one
of the arch-es that LOCKDEP depends on.
Since (16) arch-es define the Kconfig symbol LOCKDEP_SUPPORT if they
intend to have LOCKDEP support, replace the awkward list of
arch-es that LOCKDEP depends on with the LOCKDEP_SUPPORT symbol.
But wait. LOCKDEP_SUPPORT is included in LOCK_DEBUGGING_SUPPORT,
which is already a dependency here, so LOCKDEP_SUPPORT is redundant
and not needed.
That leaves the FRAME_POINTER dependency, but it is part of an
expression like this:
depends on (A && B) && (FRAME_POINTER || B')
where B' is a dependency of B so if B is true then B' is true
and the value of FRAME_POINTER does not matter.
Thus we can also delete the FRAME_POINTER dependency.
Fixes this kconfig warning: (for um, sparc64, riscv, xtensa)
WARNING: unmet direct dependencies detected for LOCKDEP
Depends on [n]: DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y] && (FRAME_POINTER [=n] || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86)
Selected by [y]:
- PROVE_LOCKING [=y] && DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y]
- LOCK_STAT [=y] && DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y]
- DEBUG_LOCK_ALLOC [=y] && DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y]
Fixes:
|
||
Feng Tang
|
cf536e1858 |
Makefile: extend 32B aligned debug option to 64B aligned
Commit
|
||
Richard Fitzgerald
|
50f530e176 |
lib: test_scanf: Add tests for sscanf number conversion
Adds test_sscanf to test various number conversion cases, as number conversion was previously broken. This also tests the simple_strtoxxx() functions exported from vsprintf.c. Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/20210514161206.30821-3-rf@opensource.cirrus.com |
||
Anshuman Khandual
|
dce4456619 |
mm/memtest: add ARCH_USE_MEMTEST
early_memtest() does not get called from all architectures. Hence enabling CONFIG_MEMTEST and providing a valid memtest=[1..N] kernel command line option might not trigger the memory pattern tests as would be expected in normal circumstances. This situation is misleading. The change here prevents the above mentioned problem after introducing a new config option ARCH_USE_MEMTEST that should be subscribed on platforms that call early_memtest(), in order to enable the config CONFIG_MEMTEST. Conversely CONFIG_MEMTEST cannot be enabled on platforms where it would not be tested anyway. Link: https://lkml.kernel.org/r/1617269193-22294-1-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> (arm64) Reviewed-by: Max Filippov <jcmvbkbc@gmail.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Will Deacon <will@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Linus Torvalds
|
b0030af53a |
Kbuild updates for v5.13
- Evaluate $(call cc-option,...) etc. only for build targets
- Add CONFIG_VMLINUX_MAP to generate .map file when linking vmlinux
- Remove unnecessary --gcc-toolchains Clang flag because the --prefix
flag finds the toolchains
- Do not pass Clang's --prefix flag when using the integrated as
- Check the assembler version in Kconfig time
- Add new CONFIG options, AS_VERSION, AS_IS_GNU, AS_IS_LLVM to clean up
some dependencies in Kconfig
- Fix invalid Module.symvers creation when building only modules without
vmlinux
- Fix false-positive modpost warnings when CONFIG_TRIM_UNUSED_KSYMS is
set, but there is no module to build
- Refactor module installation Makefile
- Support zstd for module compression
- Convert alpha and ia64 to use generic shell scripts to generate the
syscall headers
- Add a new elfnote to indicate if the kernel was built with LTO, which
will be used by pahole
- Flatten the directory structure under include/config/ so CONFIG options
and filenames match
- Change the deb source package name from linux-$(KERNELRELEASE) to
linux-upstream
-----BEGIN PGP SIGNATURE-----
iQJJBAABCgAzFiEEbmPs18K1szRHjPqEPYsBB53g2wYFAmCKOLUVHG1hc2FoaXJv
eUBrZXJuZWwub3JnAAoJED2LAQed4NsGdq8P/2z+saxIWGXVWt0ggavR0vimcY4e
NQIKGu9uZpo/lfoC78UG8HO+XvzvPUrcRuOX+WIVr2GfScgVnweDukexUAY0/2oi
4UvqhndJ0sjEwRj8mXXJ0O+PED+OtgrqrbhkLq9wHQd/jpSD4XEWXwn1g1XVrTZu
WbwP6b1G/Rnjp2lz3HKC017rPkmfsCFQB7r+hbJGKhT0rCaceheUuBvGa/XqLknr
IOyaUAY76u3Gtj6fVY1rk70kQgDMF8+LJPgdSSZ/XPCvbNJQAeop36EeRNfmxGIh
vQhFJRJeqy+K5MhCpdGtTGYDawlmQVn/f/99SkDw9F04S4ZL2Xnaaqw4L1QDhjTh
xBlckbPvmq36F4xSqWd5kYF3iwS+LsEJROwZKFLEVDb3zMsRQPEGQM/556QmrBi2
5KXzwOYEJKuobWr1hQ3PwLumJKTPGLvGEFB3Bq2eG8LrgpOAHPI4ejC2EBu0vCez
QbskP2lPlMj3MbL5iZg+6ZRlOChZ7RUrSDj6+iTeOcinmXHqQONCL6qy+um4Rfcb
zUkfwTlqM9d88u6AbO2VvQMOobMjvp4bvmqi/Xv8IiTukLHco4tc8zTuySmZwSyI
rd3RKYn367qWztX5YyaoGRPVmlMG7ssbRc4fkXiV13vfeZebNfVwlX/CHv9+IWwN
RVnMhYBhUZR68h6z
=ti9L
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Evaluate $(call cc-option,...) etc. only for build targets
- Add CONFIG_VMLINUX_MAP to generate .map file when linking vmlinux
- Remove unnecessary --gcc-toolchains Clang flag because the --prefix
flag finds the toolchains
- Do not pass Clang's --prefix flag when using the integrated as
- Check the assembler version in Kconfig time
- Add new CONFIG options, AS_VERSION, AS_IS_GNU, AS_IS_LLVM to clean up
some dependencies in Kconfig
- Fix invalid Module.symvers creation when building only modules
without vmlinux
- Fix false-positive modpost warnings when CONFIG_TRIM_UNUSED_KSYMS is
set, but there is no module to build
- Refactor module installation Makefile
- Support zstd for module compression
- Convert alpha and ia64 to use generic shell scripts to generate the
syscall headers
- Add a new elfnote to indicate if the kernel was built with LTO, which
will be used by pahole
- Flatten the directory structure under include/config/ so CONFIG
options and filenames match
- Change the deb source package name from linux-$(KERNELRELEASE) to
linux-upstream
* tag 'kbuild-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (42 commits)
kbuild: Add $(KBUILD_HOSTLDFLAGS) to 'has_libelf' test
kbuild: deb-pkg: change the source package name to linux-upstream
tools: do not include scripts/Kbuild.include
kbuild: redo fake deps at include/config/*.h
kbuild: remove TMPO from try-run
MAINTAINERS: add pattern for dummy-tools
kbuild: add an elfnote for whether vmlinux is built with lto
ia64: syscalls: switch to generic syscallhdr.sh
ia64: syscalls: switch to generic syscalltbl.sh
alpha: syscalls: switch to generic syscallhdr.sh
alpha: syscalls: switch to generic syscalltbl.sh
sysctl: use min() helper for namecmp()
kbuild: add support for zstd compressed modules
kbuild: remove CONFIG_MODULE_COMPRESS
kbuild: merge scripts/Makefile.modsign to scripts/Makefile.modinst
kbuild: move module strip/compression code into scripts/Makefile.modinst
kbuild: refactor scripts/Makefile.modinst
kbuild: rename extmod-prefix to extmod_prefix
kbuild: check module name conflict for external modules as well
kbuild: show the target directory for depmod log
...
|
||
|
Linus Torvalds
|
77d51337d6 |
- removed get_fs/set_fs
- removed broken/unmaintained MIPS KVM trap and emulate support - added support for Loongson-2K1000 - fixes and cleanups -----BEGIN PGP SIGNATURE----- iQJOBAABCAA4FiEEbt46xwy6kEcDOXoUeZbBVTGwZHAFAmCJS6oaHHRzYm9nZW5k QGFscGhhLmZyYW5rZW4uZGUACgkQeZbBVTGwZHDnbBAAnfVnVgjRZZ1y+oX9siFk xrQUVJMxEl02272yptB6VtWOLhTnFnJ2xNyjb4EcoCbTiBReSNQ8ee4WYYdCgSXh soDW6wYrlpcZau5sRg72xybmmYo4aUEh3D9PWNpCaDXFaSpnbXv28ccCTb0yLvCL 4s72wl+hLGAygJMlA6gkQ3mN3XblRk+ci1MLQOr4WpxCmWx0ozKKnHnlt21rw26w kokJRsqKAOgzzB5LIBgFBdlNKXMd+Xq8BhDXvilNbH2+LtrNIIbyJDPReZBkkO/T JWGbcNJMox/lBzqtM+eIMvuf/2QHtUAB4xXSAH+oAno6PlV0S73Oo5E+tI++ax9j WmdN3nwjhpEmwyovZwZtl+b0P14NXXAYKYOYClaRn3dFxEXnS7Fiq+EyGuOEQYBS oTa2VXQrFZfpN55wtdwmXdwWDwNuE8UtEbkSpblyTw9HQqh3jnl8xKGnaWzw7HMN D1yycBxMzuOrMiY5UBcfuzdU1K9Dgxn+ur8IfraXjjcEmZB+1TEB74/GCLK1/UJM lBUrW9ZrE5e3COA/gqPq5ZQf4W9cp8xLBMWWXxnMSBEErpePDtt3EZP2H62sK+3a wuyvEwRuiFskeUi/Tr7t89u4oXrcIZ7Q3bM3LKj3IWbsk/Znk8X03GCF86QU27zP wlrVT2ef0/8DHEI7btraCb4= =w/c4 -----END PGP SIGNATURE----- Merge tag 'mips_5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux Pull MIPS updates from Thomas Bogendoerfer: - removed get_fs/set_fs - removed broken/unmaintained MIPS KVM trap and emulate support - added support for Loongson-2K1000 - fixes and cleanups * tag 'mips_5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (107 commits) MIPS: BCM63XX: Use BUG_ON instead of condition followed by BUG. MIPS: select ARCH_KEEP_MEMBLOCK unconditionally mips: Do not include hi and lo in clobber list for R6 MIPS:DTS:Correct the license for Loongson-2K MIPS:DTS:Fix label name and interrupt number of ohci for Loongson-2K MIPS: Avoid handcoded DIVU in `__div64_32' altogether lib/math/test_div64: Correct the spelling of "dividend" lib/math/test_div64: Fix error message formatting mips/bootinfo:correct some comments of fw_arg MIPS: Avoid DIVU in `__div64_32' is result would be zero MIPS: Reinstate platform `__div64_32' handler div64: Correct inline documentation for `do_div' lib/math: Add a `do_div' test module MIPS: Makefile: Replace -pg with CC_FLAGS_FTRACE MIPS: pci-legacy: revert "use generic pci_enable_resources" MIPS: Loongson64: Add kexec/kdump support MIPS: pci-legacy: use generic pci_enable_resources MIPS: pci-legacy: remove busn_resource field MIPS: pci-legacy: remove redundant info messages MIPS: pci-legacy: stop using of_pci_range_to_resource ... |
||
|
Linus Torvalds
|
16b3d0cf5b |
Scheduler updates for this cycle are:
- Clean up SCHED_DEBUG: move the decades old mess of sysctl, procfs and debugfs interfaces
to a unified debugfs interface.
- Signals: Allow caching one sigqueue object per task, to improve performance & latencies.
- Improve newidle_balance() irq-off latencies on systems with a large number of CPU cgroups.
- Improve energy-aware scheduling
- Improve the PELT metrics for certain workloads
- Reintroduce select_idle_smt() to improve load-balancing locality - but without the previous
regressions
- Add 'scheduler latency debugging': warn after long periods of pending need_resched. This
is an opt-in feature that requires the enabling of the LATENCY_WARN scheduler feature,
or the use of the resched_latency_warn_ms=xx boot parameter.
- CPU hotplug fixes for HP-rollback, and for the 'fail' interface. Fix remaining
balance_push() vs. hotplug holes/races
- PSI fixes, plus allow /proc/pressure/ files to be written by CAP_SYS_RESOURCE tasks as well
- Fix/improve various load-balancing corner cases vs. capacity margins
- Fix sched topology on systems with NUMA diameter of 3 or above
- Fix PF_KTHREAD vs to_kthread() race
- Minor rseq optimizations
- Misc cleanups, optimizations, fixes and smaller updates
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=E7mz
-----END PGP SIGNATURE-----
Merge tag 'sched-core-2021-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
- Clean up SCHED_DEBUG: move the decades old mess of sysctl, procfs and
debugfs interfaces to a unified debugfs interface.
- Signals: Allow caching one sigqueue object per task, to improve
performance & latencies.
- Improve newidle_balance() irq-off latencies on systems with a large
number of CPU cgroups.
- Improve energy-aware scheduling
- Improve the PELT metrics for certain workloads
- Reintroduce select_idle_smt() to improve load-balancing locality -
but without the previous regressions
- Add 'scheduler latency debugging': warn after long periods of pending
need_resched. This is an opt-in feature that requires the enabling of
the LATENCY_WARN scheduler feature, or the use of the
resched_latency_warn_ms=xx boot parameter.
- CPU hotplug fixes for HP-rollback, and for the 'fail' interface. Fix
remaining balance_push() vs. hotplug holes/races
- PSI fixes, plus allow /proc/pressure/ files to be written by
CAP_SYS_RESOURCE tasks as well
- Fix/improve various load-balancing corner cases vs. capacity margins
- Fix sched topology on systems with NUMA diameter of 3 or above
- Fix PF_KTHREAD vs to_kthread() race
- Minor rseq optimizations
- Misc cleanups, optimizations, fixes and smaller updates
* tag 'sched-core-2021-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (61 commits)
cpumask/hotplug: Fix cpu_dying() state tracking
kthread: Fix PF_KTHREAD vs to_kthread() race
sched/debug: Fix cgroup_path[] serialization
sched,psi: Handle potential task count underflow bugs more gracefully
sched: Warn on long periods of pending need_resched
sched/fair: Move update_nohz_stats() to the CONFIG_NO_HZ_COMMON block to simplify the code & fix an unused function warning
sched/debug: Rename the sched_debug parameter to sched_verbose
sched,fair: Alternative sched_slice()
sched: Move /proc/sched_debug to debugfs
sched,debug: Convert sysctl sched_domains to debugfs
debugfs: Implement debugfs_create_str()
sched,preempt: Move preempt_dynamic to debug.c
sched: Move SCHED_DEBUG sysctl to debugfs
sched: Don't make LATENCYTOP select SCHED_DEBUG
sched: Remove sched_schedstats sysctl out from under SCHED_DEBUG
sched/numa: Allow runtime enabling/disabling of NUMA balance without SCHED_DEBUG
sched: Use cpu_dying() to fix balance_push vs hotplug-rollback
cpumask: Introduce DYING mask
cpumask: Make cpu_{online,possible,present,active}() inline
rseq: Optimise rseq_get_rseq_cs() and clear_rseq_cs()
...
|
||
|
Linus Torvalds
|
ffc766b31e |
This is an irregular pull request for sending a lockdep patch.
Peter Zijlstra asked us to find bad annotation that blows up the lockdep storage [1][2][3] but we could not find such annotation [4][5], and Peter cannot give us feedback any more [6]. Since we tested this patch on linux-next.git without problems, and keeping this problem unresolved discourages kernel testing which is more painful, I'm sending this patch without forever waiting for response from Peter. [1] https://lkml.kernel.org/r/20200916115057.GO2674@hirez.programming.kicks-ass.net [2] https://lkml.kernel.org/r/20201118142357.GW3121392@hirez.programming.kicks-ass.net [3] https://lkml.kernel.org/r/20201118151038.GX3121392@hirez.programming.kicks-ass.net [4] https://lkml.kernel.org/r/CACT4Y+asqRbjaN9ras=P5DcxKgzsnV0fvV0tYb2VkT+P00pFvQ@mail.gmail.com [5] https://lkml.kernel.org/r/4b89985e-99f9-18bc-0bf1-c883127dc70c@i-love.sakura.ne.jp [6] https://lkml.kernel.org/r/CACT4Y+YnHFV1p5mbhby2nyOaNTy8c_yoVk86z5avo14KWs0s1A@mail.gmail.com kernel/locking/lockdep.c | 2 - kernel/locking/lockdep_internals.h | 8 +++---- lib/Kconfig.debug | 40 +++++++++++++++++++++++++++++++++++++ 3 files changed, 45 insertions(+), 5 deletions(-) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAABAgAGBQJghetlAAoJEEJfEo0MZPUqMaEP/i0pkfOyKBdUe61Y9g0A2TmN h5I59KiSsgmx7dK90Q2GP1kUQE9ROCiqIz9qHzCzWfk9jljgFgRfECBKHqH+K7Tq AlQQkJmAiwpg+1scSkhoxBOrSGXHe2xB4qvazvw7tAAIDPjcV/pkFlNKaUtItzr2 VPr4t6Eis/MZ7Pau2xLFLX2gRn5KvpsbcL+wydrDfqlXx3pNXlBvChBxixk90HS6 0BC5pgb68pXm8Emzbp3+iloy0VuG/BHDA/vy02k5zUjMM7Zy+aGxR/cl2jvc+lWd wyRWhwbSjTUrYs3Olmjkybj15lsgl573oIptVhIIrXuvjpyY5v1IH1gkLoxJgr5d yaKSdYwyN/OPI3KireEfaSgc6IqrJ1K9gLh1Knqw4JeoJngEVEkmBwBg/izpiXoL WVlWZuLkYtOTWxpsTOiCtzv4KkFhFtE61IEAIEsvvj9oeLQJu7JUR8oW0ZQtdfXg Em0IbObS8VGW322MNmb1p9SsaYvOueWyKzImEVlCBAb2g6PUYuiAwiOw8/tvsDFr KPXCPpaqKCFtp+BG21fn6GpTqJ4GteWy6JK6C9i/xhIWmv+QRijNEmPlyYQ0YMkd a8z8rqRqexknlPCJy/9AZWfBo6kg5Dt3icrrNVKoXLVC/LNYaHQvIKsGzZaQ1Pyq W6rnMbLCRD199sqoEFrH =E7U/ -----END PGP SIGNATURE----- Merge tag 'tomoyo-pr-20210426' of git://git.osdn.net/gitroot/tomoyo/tomoyo-test1 Pull lockdep capacity limit updates from Tetsuo Handa: "syzbot is occasionally reporting that fuzz testing is terminated due to hitting upper limits lockdep can track. Analysis via /proc/lockdep* did not show any obvious culprits, allow tuning tracing capacity constants" * tag 'tomoyo-pr-20210426' of git://git.osdn.net/gitroot/tomoyo/tomoyo-test1: lockdep: Allow tuning tracing capacity constants. |
||
Masahiro Yamada
|
2e98815794 |
kbuild: dwarf: use AS_VERSION instead of test_dwarf5_support.sh
The test code in scripts/test_dwarf5_support.sh is somewhat difficult to understand, but after all, we want to check binutils >= 2.35.2 From the former discussion, the requirement for generating DWARF v5 from C code is as follows: - gcc + gnu as -> requires gcc 5.0+ (but 7.0+ for full support) - clang + gnu as -> requires binutils 2.35.2+ - clang + integrated as -> OK Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> |
||
Rasmus Villemoes
|
5cc1247204 |
kbuild: add CONFIG_VMLINUX_MAP expert option
It can be quite useful to have ld emit a link map file, in order to debug or verify that special sections end up where they are supposed to, and to see what LD_DEAD_CODE_DATA_ELIMINATION manages to get rid of. The only reason I'm not just adding this unconditionally is that the .map file can be rather large (several MB), and that's a waste of space when one isn't interested in these things. Also make it depend on CONFIG_EXPERT. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> |
||
Maciej W. Rozycki
|
5086ea4b0f |
lib/math: Add a `do_div' test module
Implement a module for correctness and performance evaluation for the `do_div' function, often handled in an optimised manner by platform code. Use a somewhat randomly generated set of inputs that is supposed to be representative, using the same set of divisors twice, expressed as a constant and as a variable each, so as to verify the implementation for both cases should they be handled by different code execution paths. Reference results were produced with GNU bc. At the conclusion output the total execution time elapsed. Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> |
||
Ingo Molnar
|
d0d252b8ca |
Linux 5.12-rc8
-----BEGIN PGP SIGNATURE----- iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAmB8qHweHHRvcnZhbGRz QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGEXIIAILUbsTJsNsvZIkZ uQ6SY6gnsPFkRiSRjY0YsZLUnqjTuiiHeTz4gzkonddwdnAp/9g6OIHIEBaeTqBh sTUMU/61Fgtrt/IvkA1yJ3rlawqgwdMe2VdimB+EFhufcSKq+5vpd3MVP4IuGx4E J3psoTU4gVltFs5t+1QjvI3XmByN0Qm8FMRXR7iL+zov1QTmGwR3G6Rn4AymG+QT pdruKboyZPfsrFGSVx7wd3HpFyQcrclEX9rKmBNZqets9d9JGWnqnEN4vQKmwO86 4MV29ucdMXH0AMB3kzGdVp0Ji2Ykt5W0K+MUWbFLtcSxnpu1OyBKGsEAMlRbD7ik gm0bMSw= =qHI0 -----END PGP SIGNATURE----- Merge tag 'v5.12-rc8' into sched/core, to pick up fixes Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
Peter Zijlstra
|
d86ba83165 |
sched: Don't make LATENCYTOP select SCHED_DEBUG
SCHED_DEBUG is not in fact required for LATENCYTOP, don't select it. Suggested-by: Mel Gorman <mgorman@suse.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Valentin Schneider <valentin.schneider@arm.com> Link: https://lkml.kernel.org/r/20210412102001.224578981@infradead.org |
||
Julian Braha
|
7d37cb2c91 |
lib: fix kconfig dependency on ARCH_WANT_FRAME_POINTERS
When LATENCYTOP, LOCKDEP, or FAULT_INJECTION_STACKTRACE_FILTER is
enabled and ARCH_WANT_FRAME_POINTERS is disabled, Kbuild gives a warning
such as:
WARNING: unmet direct dependencies detected for FRAME_POINTER
Depends on [n]: DEBUG_KERNEL [=y] && (M68K || UML || SUPERH) || ARCH_WANT_FRAME_POINTERS [=n] || MCOUNT [=n]
Selected by [y]:
- LATENCYTOP [=y] && DEBUG_KERNEL [=y] && STACKTRACE_SUPPORT [=y] && PROC_FS [=y] && !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM && !ARC && !X86
Depending on ARCH_WANT_FRAME_POINTERS causes a recursive dependency
error. ARCH_WANT_FRAME_POINTERS is to be selected by the architecture,
and is not supposed to be overridden by other config options.
Link: https://lkml.kernel.org/r/20210329165329.27994-1-julianbraha@gmail.com
Signed-off-by: Julian Braha <julianbraha@gmail.com>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Necip Fazil Yildiran <fazilyildiran@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
||
Tetsuo Handa
|
5dc33592e9 |
lockdep: Allow tuning tracing capacity constants.
Since syzkaller continues various test cases until the kernel crashes, syzkaller tends to examine more locking dependencies than normal systems. As a result, syzbot is reporting that the fuzz testing was terminated due to hitting upper limits lockdep can track [1] [2] [3]. Since analysis via /proc/lockdep* did not show any obvious culprit [4] [5], we have no choice but allow tuning tracing capacity constants. [1] https://syzkaller.appspot.com/bug?id=3d97ba93fb3566000c1c59691ea427370d33ea1b [2] https://syzkaller.appspot.com/bug?id=381cb436fe60dc03d7fd2a092b46d7f09542a72a [3] https://syzkaller.appspot.com/bug?id=a588183ac34c1437fc0785e8f220e88282e5a29f [4] https://lkml.kernel.org/r/4b8f7a57-fa20-47bd-48a0-ae35d860f233@i-love.sakura.ne.jp [5] https://lkml.kernel.org/r/1c351187-253b-2d49-acaf-4563c63ae7d2@i-love.sakura.ne.jp References: https://lkml.kernel.org/r/1595640639-9310-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Acked-by: Dmitry Vyukov <dvyukov@google.com> |
||
Alexander Potapenko
|
0ce20dd840 |
mm: add Kernel Electric-Fence infrastructure
Patch series "KFENCE: A low-overhead sampling-based memory safety error detector", v7. This adds the Kernel Electric-Fence (KFENCE) infrastructure. KFENCE is a low-overhead sampling-based memory safety error detector of heap use-after-free, invalid-free, and out-of-bounds access errors. This series enables KFENCE for the x86 and arm64 architectures, and adds KFENCE hooks to the SLAB and SLUB allocators. KFENCE is designed to be enabled in production kernels, and has near zero performance overhead. Compared to KASAN, KFENCE trades performance for precision. The main motivation behind KFENCE's design, is that with enough total uptime KFENCE will detect bugs in code paths not typically exercised by non-production test workloads. One way to quickly achieve a large enough total uptime is when the tool is deployed across a large fleet of machines. KFENCE objects each reside on a dedicated page, at either the left or right page boundaries. The pages to the left and right of the object page are "guard pages", whose attributes are changed to a protected state, and cause page faults on any attempted access to them. Such page faults are then intercepted by KFENCE, which handles the fault gracefully by reporting a memory access error. Guarded allocations are set up based on a sample interval (can be set via kfence.sample_interval). After expiration of the sample interval, the next allocation through the main allocator (SLAB or SLUB) returns a guarded allocation from the KFENCE object pool. At this point, the timer is reset, and the next allocation is set up after the expiration of the interval. To enable/disable a KFENCE allocation through the main allocator's fast-path without overhead, KFENCE relies on static branches via the static keys infrastructure. The static branch is toggled to redirect the allocation to KFENCE. The KFENCE memory pool is of fixed size, and if the pool is exhausted no further KFENCE allocations occur. The default config is conservative with only 255 objects, resulting in a pool size of 2 MiB (with 4 KiB pages). We have verified by running synthetic benchmarks (sysbench I/O, hackbench) and production server-workload benchmarks that a kernel with KFENCE (using sample intervals 100-500ms) is performance-neutral compared to a non-KFENCE baseline kernel. KFENCE is inspired by GWP-ASan [1], a userspace tool with similar properties. The name "KFENCE" is a homage to the Electric Fence Malloc Debugger [2]. For more details, see Documentation/dev-tools/kfence.rst added in the series -- also viewable here: https://raw.githubusercontent.com/google/kasan/kfence/Documentation/dev-tools/kfence.rst [1] http://llvm.org/docs/GwpAsan.html [2] https://linux.die.net/man/3/efence This patch (of 9): This adds the Kernel Electric-Fence (KFENCE) infrastructure. KFENCE is a low-overhead sampling-based memory safety error detector of heap use-after-free, invalid-free, and out-of-bounds access errors. KFENCE is designed to be enabled in production kernels, and has near zero performance overhead. Compared to KASAN, KFENCE trades performance for precision. The main motivation behind KFENCE's design, is that with enough total uptime KFENCE will detect bugs in code paths not typically exercised by non-production test workloads. One way to quickly achieve a large enough total uptime is when the tool is deployed across a large fleet of machines. KFENCE objects each reside on a dedicated page, at either the left or right page boundaries. The pages to the left and right of the object page are "guard pages", whose attributes are changed to a protected state, and cause page faults on any attempted access to them. Such page faults are then intercepted by KFENCE, which handles the fault gracefully by reporting a memory access error. To detect out-of-bounds writes to memory within the object's page itself, KFENCE also uses pattern-based redzones. The following figure illustrates the page layout: ---+-----------+-----------+-----------+-----------+-----------+--- | xxxxxxxxx | O : | xxxxxxxxx | : O | xxxxxxxxx | | xxxxxxxxx | B : | xxxxxxxxx | : B | xxxxxxxxx | | x GUARD x | J : RED- | x GUARD x | RED- : J | x GUARD x | | xxxxxxxxx | E : ZONE | xxxxxxxxx | ZONE : E | xxxxxxxxx | | xxxxxxxxx | C : | xxxxxxxxx | : C | xxxxxxxxx | | xxxxxxxxx | T : | xxxxxxxxx | : T | xxxxxxxxx | ---+-----------+-----------+-----------+-----------+-----------+--- Guarded allocations are set up based on a sample interval (can be set via kfence.sample_interval). After expiration of the sample interval, a guarded allocation from the KFENCE object pool is returned to the main allocator (SLAB or SLUB). At this point, the timer is reset, and the next allocation is set up after the expiration of the interval. To enable/disable a KFENCE allocation through the main allocator's fast-path without overhead, KFENCE relies on static branches via the static keys infrastructure. The static branch is toggled to redirect the allocation to KFENCE. To date, we have verified by running synthetic benchmarks (sysbench I/O, hackbench) that a kernel compiled with KFENCE is performance-neutral compared to the non-KFENCE baseline. For more details, see Documentation/dev-tools/kfence.rst (added later in the series). [elver@google.com: fix parameter description for kfence_object_start()] Link: https://lkml.kernel.org/r/20201106092149.GA2851373@elver.google.com [elver@google.com: avoid stalling work queue task without allocations] Link: https://lkml.kernel.org/r/CADYN=9J0DQhizAGB0-jz4HOBBh+05kMBXb4c0cXMS7Qi5NAJiw@mail.gmail.com Link: https://lkml.kernel.org/r/20201110135320.3309507-1-elver@google.com [elver@google.com: fix potential deadlock due to wake_up()] Link: https://lkml.kernel.org/r/000000000000c0645805b7f982e4@google.com Link: https://lkml.kernel.org/r/20210104130749.1768991-1-elver@google.com [elver@google.com: add option to use KFENCE without static keys] Link: https://lkml.kernel.org/r/20210111091544.3287013-1-elver@google.com [elver@google.com: add missing copyright and description headers] Link: https://lkml.kernel.org/r/20210118092159.145934-1-elver@google.com Link: https://lkml.kernel.org/r/20201103175841.3495947-2-elver@google.com Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Alexander Potapenko <glider@google.com> Reviewed-by: Dmitry Vyukov <dvyukov@google.com> Reviewed-by: SeongJae Park <sjpark@amazon.de> Co-developed-by: Marco Elver <elver@google.com> Reviewed-by: Jann Horn <jannh@google.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Paul E. McKenney <paulmck@kernel.org> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christopher Lameter <cl@linux.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Rientjes <rientjes@google.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hillf Danton <hdanton@sina.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Joern Engel <joern@purestorage.com> Cc: Kees Cook <keescook@chromium.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Linus Torvalds
|
6fbd6cf85a |
Kbuild updates for v5.12
- Fix false-positive build warnings for ARCH=ia64 builds
- Optimize dictionary size for module compression with xz
- Check the compiler and linker versions in Kconfig
- Fix misuse of extra-y
- Support DWARF v5 debug info
- Clamp SUBLEVEL to 255 because stable releases 4.4.x and 4.9.x
exceeded the limit
- Add generic syscall{tbl,hdr}.sh for cleanups across arches
- Minor cleanups of genksyms
- Minor cleanups of Kconfig
-----BEGIN PGP SIGNATURE-----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=sLxb
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Fix false-positive build warnings for ARCH=ia64 builds
- Optimize dictionary size for module compression with xz
- Check the compiler and linker versions in Kconfig
- Fix misuse of extra-y
- Support DWARF v5 debug info
- Clamp SUBLEVEL to 255 because stable releases 4.4.x and 4.9.x
exceeded the limit
- Add generic syscall{tbl,hdr}.sh for cleanups across arches
- Minor cleanups of genksyms
- Minor cleanups of Kconfig
* tag 'kbuild-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (38 commits)
initramfs: Remove redundant dependency of RD_ZSTD on BLK_DEV_INITRD
kbuild: remove deprecated 'always' and 'hostprogs-y/m'
kbuild: parse C= and M= before changing the working directory
kbuild: reuse this-makefile to define abs_srctree
kconfig: unify rule of config, menuconfig, nconfig, gconfig, xconfig
kconfig: omit --oldaskconfig option for 'make config'
kconfig: fix 'invalid option' for help option
kconfig: remove dead code in conf_askvalue()
kconfig: clean up nested if-conditionals in check_conf()
kconfig: Remove duplicate call to sym_get_string_value()
Makefile: Remove # characters from compiler string
Makefile: reuse CC_VERSION_TEXT
kbuild: check the minimum linker version in Kconfig
kbuild: remove ld-version macro
scripts: add generic syscallhdr.sh
scripts: add generic syscalltbl.sh
arch: syscalls: remove $(srctree)/ prefix from syscall tables
arch: syscalls: add missing FORCE and fix 'targets' to make if_changed work
gen_compile_commands: prune some directories
kbuild: simplify access to the kernel's version
...
|
||
|
Nick Desaulniers
|
98cd6f521f |
Kconfig: allow explicit opt in to DWARF v5
DWARF v5 is the latest standard of the DWARF debug info format. GCC 11 will change the implicit default DWARF version, if left unspecified, to DWARF v5. Allow users of Clang and older versions of GCC that have not changed the implicit default DWARF version to DWARF v5 to opt in. This can help testing consumers of DWARF debug info in preparation of v5 becoming more widespread, as well as result in significant binary size savings of the pre-stripped vmlinux image. DWARF5 wins significantly in terms of size when mixed with compression (CONFIG_DEBUG_INFO_COMPRESSED). 363M vmlinux.clang12.dwarf5.compressed 434M vmlinux.clang12.dwarf4.compressed 439M vmlinux.clang12.dwarf2.compressed 457M vmlinux.clang12.dwarf5 536M vmlinux.clang12.dwarf4 548M vmlinux.clang12.dwarf2 515M vmlinux.gcc10.2.dwarf5.compressed 599M vmlinux.gcc10.2.dwarf4.compressed 624M vmlinux.gcc10.2.dwarf2.compressed 630M vmlinux.gcc10.2.dwarf5 765M vmlinux.gcc10.2.dwarf4 809M vmlinux.gcc10.2.dwarf2 Though the quality of debug info is harder to quantify; size is not a proxy for quality. Jakub notes: One thing is GCC DWARF-5 support, that is whether the compiler will support -gdwarf-5 flag, and that support should be there from GCC 7 onwards. All [GCC] 5.1 - 6.x did was start accepting -gdwarf-5 as experimental option that enabled some small DWARF subset (initially only a few DW_LANG_* codes newly added to DWARF5 drafts). Only GCC 7 (released after DWARF 5 has been finalized) started emitting DWARF5 section headers and got most of the DWARF5 changes in... Another separate thing is whether the assembler does support the -gdwarf-5 option (i.e. if you can compile assembler files with -Wa,-gdwarf-5) ... That option is about whether the assembler will emit DWARF5 or DWARF2 .debug_line. It is fine to compile C sources with -gdwarf-5 and use DWARF2 .debug_line for assembler files if as doesn't support it. Version check GCC so that we don't need to worry about the difference in command line args between GNU readelf and llvm-readelf/llvm-dwarfdump to validate the DWARF Version in the assembler feature detection script. Most issues with clang produced assembler were fixed in binutils 2.35.1, but 2.35.2 fixed issues related to requiring the flag -Wa,-gdwarf-5 explicitly. The added shell script test checks for the latter, and is only required when using clang without its integrated assembler, though we use for clang regardless as we do not yet have a way to query the assembler from Kconfig. Disabled for now if CONFIG_DEBUG_INFO_BTF is set; pahole doesn't yet recognize the new additions to the DWARF debug info. This only modifies the DWARF version emitted by the compiler, not the assembler. The DWARF version of a binary can be validated with: $ llvm-dwarfdump <object file> | head -n 4 | grep version or $ readelf --debug-dump=info <object file> 2>/dev/null | grep Version Parts of the tree don't reuse DEBUG_CFLAGS as they should; such cleanup is left as a follow up. Link: http://www.dwarfstd.org/doc/DWARF5.pdf Link: https://bugzilla.redhat.com/show_bug.cgi?id=1922707 Reported-by: Sedat Dilek <sedat.dilek@gmail.com> Suggested-by: Arvind Sankar <nivedita@alum.mit.edu> Suggested-by: Caroline Tice <cmtice@google.com> Suggested-by: Fangrui Song <maskray@google.com> Suggested-by: Jakub Jelinek <jakub@redhat.com> Suggested-by: Masahiro Yamada <masahiroy@kernel.org> Suggested-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> # LLVM/Clang v12.0.0-rc1 x86-64 Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> |
||
|
Nick Desaulniers
|
a66049e2cf |
Kbuild: make DWARF version a choice
Adds a default CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT which allows the implicit default version of DWARF emitted by the toolchain to progress over time. Modifies CONFIG_DEBUG_INFO_DWARF4 to be a member of a choice, making it mutually exclusive with CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT. Users may want to select this if they are using a newer toolchain, but have consumers of the DWARF debug info that aren't yet ready for newer DWARF versions' debug info. Does so in a way that's forward compatible with existing configs, and makes adding future versions more straightforward. This patch does not change the current behavior or selection of DWARF version for users upgrading to kernels with this patch. GCC since ~4.8 has defaulted to DWARF v4 implicitly, and GCC 11 has bumped this to v5. Remove the Kconfig help text about DWARF v4 being larger. It's empirically false for the latest toolchains for x86_64 defconfig, has no point of reference (I suspect it was DWARF v2 but that's stil empirically false), and debug info size is not a qualatative measure. Suggested-by: Arvind Sankar <nivedita@alum.mit.edu> Suggested-by: Fangrui Song <maskray@google.com> Suggested-by: Jakub Jelinek <jakub@redhat.com> Suggested-by: Mark Wielaard <mark@klomp.org> Suggested-by: Masahiro Yamada <masahiroy@kernel.org> Suggested-by: Nathan Chancellor <nathan@kernel.org> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> |
||
|
Ingo Molnar
|
62137364e3 |
Merge branch 'linus' into locking/core, to pick up upstream fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Masahiro Yamada
|
83272e6d47 |
kbuild: Remove $(cc-option,-gdwarf-4) dependency from DEBUG_INFO_DWARF4
The -gdwarf-4 flag is supported by GCC 4.5+, and also by Clang. You can see it at https://godbolt.org/z/6ed1oW For gcc 4.5.3 pane, line 37: .value 0x4 For clang 10.0.1 pane, line 117: .short 4 Given Documentation/process/changes.rst stating GCC 4.9 is the minimal version, this cc-option is unneeded. Note ---- CONFIG_DEBUG_INFO_DWARF4 controls the DWARF version only for C files. As you can see in the top Makefile, -gdwarf-4 is only passed to CFLAGS. ifdef CONFIG_DEBUG_INFO_DWARF4 DEBUG_CFLAGS += -gdwarf-4 endif This flag is used when compiling *.c files. On the other hand, the assembler is always given -gdwarf-2. KBUILD_AFLAGS += -Wa,-gdwarf-2 Hence, the debug info that comes from *.S files is always DWARF v2. This is simply because GAS supported only -gdwarf-2 for a long time. Recently, GAS gained the support for --gdwarf-[345] options. [1] And, also we have Clang integrated assembler. So, the debug info for *.S files might be improved in the future. In my understanding, the current code is intentional, not a bug. [1] https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=31bf18645d98b4d3d7357353be840e320649a67d Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> |
||
Mark Rutland
|
997acaf6b4 |
lockdep: report broken irq restoration
We generally expect local_irq_save() and local_irq_restore() to be paired and sanely nested, and so local_irq_restore() expects to be called with irqs disabled. Thus, within local_irq_restore() we only trace irq flag changes when unmasking irqs. This means that a sequence such as: | local_irq_disable(); | local_irq_save(flags); | local_irq_enable(); | local_irq_restore(flags); ... is liable to break things, as the local_irq_restore() would mask irqs without tracing this change. Similar problems may exist for architectures whose arch_irq_restore() function depends on being called with irqs disabled. We don't consider such sequences to be a good idea, so let's define those as forbidden, and add tooling to detect such broken cases. This patch adds debug code to WARN() when raw_local_irq_restore() is called with irqs enabled. As raw_local_irq_restore() is expected to pair with raw_local_irq_save(), it should never be called with irqs enabled. To avoid the possibility of circular header dependencies between irqflags.h and bug.h, the warning is handled in a separate C file. The new code is all conditional on a new CONFIG_DEBUG_IRQFLAGS symbol which is independent of CONFIG_TRACE_IRQFLAGS. As noted above such cases will confuse lockdep, so CONFIG_DEBUG_LOCKDEP now selects CONFIG_DEBUG_IRQFLAGS. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20210111153707.10071-1-mark.rutland@arm.com |