Helge Deller 87c482bdfa modules: Ensure natural alignment for .altinstructions and __bug_table sections ... In the kernel image vmlinux.lds.S linker scripts the .altinstructions and __bug_table sections are 4- or 8-byte aligned because they hold 32- and/or 64-bit values. Most architectures use altinstructions and BUG() or WARN() in modules as well, but in the module linker script (module.lds.S) those sections are currently missing. As consequence the linker will store their content byte-aligned by default, which then can lead to unnecessary unaligned memory accesses by the CPU when those tables are processed at runtime. Usually unaligned memory accesses are unnoticed, because either the hardware (as on x86 CPUs) or in-kernel exception handlers (e.g. on parisc or sparc) emulate and fix them up at runtime. Nevertheless, such unaligned accesses introduce a performance penalty and can even crash the kernel if there is a bug in the unalignment exception handlers (which happened once to me on the parisc architecture and which is why I noticed that issue at all). This patch fixes a non-critical issue and might be backported at any time. It's trivial and shouldn't introduce any regression because it simply tells the linker to use a different (8-byte alignment) for those sections by default. Signed-off-by: Helge Deller <deller@gmx.de> Link: https://lore.kernel.org/all/Yr8%2Fgr8e8I7tVX4d@p100/ Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>		2022-07-11 10:49:14 -07:00
..
atomic	locking/atomic: Add generic try_cmpxchg64 support	2022-05-18 00:08:27 +02:00
basic	randstruct: Move seed generation into scripts/basic/	2022-05-08 01:33:07 -07:00
clang-tools	gen_compile_commands: fix missing 'sys' package	2021-09-19 10:13:03 +09:00
coccinelle	drop fen.cocci	2022-01-15 12:15:35 +01:00
dtc	h8300: remove stale bindings and symlink	2022-05-20 22:40:56 +02:00
dummy-tools	scripts: dummy-tools, add pahole	2022-05-08 03:16:59 +09:00
gcc-plugins	gcc-plugins: use KERNELVERSION for plugin version	2022-05-24 08:25:16 -07:00
gdb	scripts/gdb: change kernel config dumping method	2022-06-11 18:31:53 +09:00
genksyms	genksyms: adjust the output format to modpost	2022-05-24 16:33:20 +09:00
kconfig	scripts: kconfig: nconf: make nconfig accept jk keybindings	2022-06-05 06:20:57 +09:00
ksymoops
mod	modpost: fix section mismatch check for exported init/exit sections	2022-06-20 08:18:03 +09:00
package	objtool: Add CONFIG_OBJTOOL	2022-04-22 12:32:03 +02:00
selinux	selinux: declare data arrays const	2022-05-03 15:53:49 -04:00
tracing	scripts/tracing: fix the bug that can't parse raw_trace_func	2021-08-04 17:49:26 -04:00
.gitignore	certs: move scripts/extract-cert to certs/	2022-01-08 18:28:21 +09:00
adjust_autoksyms.sh	kbuild: split the second line of *.mod into *.usyms	2022-05-08 03:16:59 +09:00
as-version.sh	kbuild: Switch to 'f' variants of integrated assembler flag	2021-09-03 08:17:20 +09:00
asn1_compiler.c
bin2c.c
bloat-o-meter	scripts/bloat-o-meter: filter out vermagic as it is not relevant	2022-04-29 14:37:57 -07:00
bootgraph.pl
bpf_doc.py	bpf: Add verifier support for dynptrs	2022-05-23 14:30:17 -07:00
cc-can-link.sh
cc-version.sh	kbuild: collect minimum tool versions into scripts/min-tool-version.sh	2021-04-25 05:14:26 +09:00
check_extable.sh	scripts: check_extable: fix typo in user error message	2021-09-08 11:50:28 -07:00
check-blacklist-hashes.awk	certs: Check that builtin blacklist hashes are valid	2022-05-23 18:47:49 +03:00
check-local-export	scripts/check-local-export: avoid 'wait $!' for process substitution	2022-06-10 03:47:13 +09:00
check-sysctl-docs
checkdeclares.pl	scripts: make some scripts executable	2021-08-10 09:13:25 +09:00
checkincludes.pl
checkkconfigsymbols.py	checkkconfigsymbols.py: Remove skipping of help lines in parse_kconfig_file	2021-09-19 10:13:03 +09:00
checkpatch.pl	checkpatch: add new alloc functions to alloc with multiplies check	2022-04-26 01:30:33 -05:00
checkstack.pl	scripts/checkstack.pl: fix arm sp regex	2020-05-26 00:03:16 +09:00
checksyscalls.sh	checksyscalls: ignore -Wunused-macros	2022-05-08 03:16:59 +09:00
checkversion.pl	scripts: checkversion: modernize linux/version.h search strings	2021-08-05 20:55:39 +09:00
cleanfile
cleanpatch
coccicheck	scripts: coccicheck: fix troubles on non-English builds	2021-05-18 11:09:59 +02:00
config	kconfig: config script: add a little user help	2021-01-04 10:38:11 +09:00
const_structs.checkpatch	const_structs.checkpatch: add frequently used ops structs	2022-01-20 08:52:54 +02:00
decode_stacktrace.sh	scripts/decode_stacktrace.sh: support old bash version	2022-04-29 14:37:57 -07:00
decodecode	scripts/decodecode: fix faulting instruction no print when opps.file is DOS format	2021-11-06 13:30:32 -07:00
depmod.sh	depmod: handle the case of /sbin/depmod without /sbin in PATH	2021-01-01 12:26:39 -08:00
dev-needs.sh	scripts/dev-needs: Add script to list device dependencies	2020-09-04 18:19:37 +02:00
diffconfig	scripts: switch explicitly to Python 3	2021-01-22 06:34:44 +09:00
documentation-file-ref-check	scripts: documentation-file-ref-check: fix bpf selftests path	2021-10-26 09:42:29 -06:00
export_report.pl
extract_xc3028.pl
extract-ikconfig
extract-module-sig.pl
extract-sys-certs.pl
extract-vmlinux
faddr2line	faddr2line: Fix overlapping text section failures, the sequel	2022-06-06 11:50:11 -07:00
file-size.sh
find-unused-docs.sh
gcc-goto.sh
gcc-ld
gcc-x86_32-has-stack-protector.sh	x86/stackprotector/32: Make the canary into a regular percpu variable	2021-03-08 13:19:05 +01:00
gcc-x86_64-has-stack-protector.sh
gen_autoksyms.sh	kbuild: Ignore __this_module in gen_autoksyms.sh	2022-06-26 06:15:05 +09:00
gen_ksymdeps.sh	kbuild: redo fake deps at include/ksym/*.h	2021-09-03 08:17:21 +09:00
gen-randstruct-seed.sh	randstruct: Move seed generation into scripts/basic/	2022-05-08 01:33:07 -07:00
generate_initcall_order.pl	init: lto: ensure initcall ordering	2021-01-14 08:21:09 -08:00
get_abi.pl	scripts/get_abi: Fix wrong script file name in the help message	2022-04-24 10:38:44 +02:00
get_dvb_firmware
get_feat.pl	scripts/get_feat.pl: allow output the parsed file names	2022-03-28 13:53:46 -06:00
get_maintainer.pl	get_maintainer: Honor mailmap for in file emails	2022-04-29 14:38:00 -07:00
gfp-translate
headerdep.pl
headers_install.sh	Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-08-07 13:29:39 -07:00
insert-sys-cert.c
install.sh	kbuild: factor out the common installation code into scripts/install.sh	2022-05-11 21:45:53 +09:00
jobserver-exec	scripts/jobserver-exec: Fix a typo ("envirnoment")	2021-05-17 12:10:03 +09:00
kallsyms.c	scripts/kallsyms: update usage message of the kallsyms program	2022-05-27 15:51:48 +09:00
Kbuild.include	kbuild: add cmd_and_savecmd macro	2022-06-01 23:07:29 +09:00
Kconfig.include	kbuild: check the minimum assembler version in Kconfig	2021-04-25 05:14:41 +09:00
kernel-doc	scripts/kernel-doc: change the line number meta info	2022-03-28 13:53:46 -06:00
ld-version.sh	kbuild: collect minimum tool versions into scripts/min-tool-version.sh	2021-04-25 05:14:26 +09:00
leaking_addresses.pl	leaking_addresses: Always print a trailing newline	2021-10-15 11:25:13 +02:00
Lindent
link-vmlinux.sh	kbuild: factor out the common objtool arguments	2022-06-05 06:20:57 +09:00
Makefile	kbuild: Allow kernel installation packaging to override pkg-config	2022-04-05 17:03:31 +09:00
Makefile.asm-generic	kbuild: prefix $(srctree)/ to some included Makefiles	2021-03-15 19:20:48 +09:00
Makefile.build	kbuild: avoid regex RS for POSIX awk	2022-06-08 01:27:26 +09:00
Makefile.clang	um: Allow builds with Clang	2022-03-21 08:13:03 -07:00
Makefile.clean	kbuild: drop $(objtree)/ prefix support for clean-files	2022-05-08 03:17:00 +09:00
Makefile.compiler	kbuild: remove TMPO from try-run	2021-04-25 05:25:56 +09:00
Makefile.debug	kbuild: split DEBUG_CFLAGS out to scripts/Makefile.debug	2021-10-24 13:48:33 +09:00
Makefile.dtbinst	kbuild: prefix $(srctree)/ to some included Makefiles	2021-03-15 19:20:48 +09:00
Makefile.extrawarn	kbuild: support W=e to make build abort in case of warning	2022-05-08 03:16:59 +09:00
Makefile.gcc-plugins	randstruct: Split randstruct Makefile and CFLAGS	2022-05-08 01:33:06 -07:00
Makefile.headersinst	kbuild: prefix $(srctree)/ to some included Makefiles	2021-03-15 19:20:48 +09:00
Makefile.host	kbuild: sort hostprogs before passing it to ifneq	2020-08-10 01:32:59 +09:00
Makefile.kasan	kasan: always respect CONFIG_KASAN_STACK	2021-09-24 16:13:35 -07:00
Makefile.kcov	kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled	2020-08-10 01:32:59 +09:00
Makefile.kcsan	kcsan: Ignore GCC 11+ warnings about TSan runtime support	2021-12-09 16:42:27 -08:00
Makefile.lib	A set of objtool fixes:	2022-06-05 09:45:27 -07:00
Makefile.modfinal	kbuild: do not create *.prelink.o for Clang LTO or IBT	2022-05-29 18:39:35 +09:00
Makefile.modinst	kbuild: do not quote string values in include/config/auto.conf	2022-01-08 18:03:57 +09:00
Makefile.modpost	kbuild: do not create *.prelink.o for Clang LTO or IBT	2022-05-29 18:39:35 +09:00
Makefile.package	kbuild: Add make tarzst-pkg build option	2021-10-12 11:50:46 +09:00
Makefile.randstruct	randstruct: Enable Clang support	2022-05-08 01:33:07 -07:00
Makefile.ubsan	ubsan: remove CONFIG_UBSAN_OBJECT_SIZE	2022-01-20 08:52:55 +02:00
Makefile.userprogs	kbuild: add infrastructure to build userspace programs	2020-05-17 18:52:01 +09:00
Makefile.vmlinux	kbuild: link symbol CRCs at final link, removing CONFIG_MODULE_REL_CRCS	2022-05-24 16:33:20 +09:00
Makefile.vmlinux_o	kbuild: factor out the common objtool arguments	2022-06-05 06:20:57 +09:00
makelst
markup_oops.pl
min-tool-version.sh	scripts/min-tool-version.sh: raise minimum clang version to 14.0.0 for s390	2022-05-17 15:16:29 +02:00
mkcompile_h	sched/preempt: Tell about PREEMPT_DYNAMIC on kernel headers	2022-03-11 15:36:35 +01:00
mksysmap	mksysmap: Fix the mismatch of '.L' symbols in System.map	2020-06-06 23:39:20 +09:00
mkuboot.sh
module.lds.S	modules: Ensure natural alignment for .altinstructions and __bug_table sections	2022-07-11 10:49:14 -07:00
modules-check.sh	kbuild: check module name conflict for external modules as well	2021-04-25 05:22:42 +09:00
nsdeps	scripts/nsdeps: adjust to the format change of *.mod files	2022-06-08 20:14:13 +09:00
objdiff	kbuild: clean .tmp_* pattern by make clean	2022-06-05 06:20:57 +09:00
objdump-func	scripts: Create objdump-func helper script	2022-05-12 10:08:43 -07:00
pahole-flags.sh	scripts/pahole-flags.sh: Parse DWARF and generate BTF with multithreading.	2022-02-22 14:32:44 -08:00
pahole-version.sh	kbuild: Add CONFIG_PAHOLE_VERSION	2022-02-02 11:19:33 +01:00
parse-maintainers.pl	parse-maintainers: Do not sort section content by default	2020-03-26 15:08:27 -07:00
patch-kernel
profile2linkerlist.pl
prune-kernel	scripts/prune-kernel: Use kernel-install if available	2022-05-11 21:46:38 +09:00
recordmcount.c	ftrace: Have recordmcount use w8 to read relp->r_info in arm64_is_fake_mcount	2021-03-02 17:27:18 -05:00
recordmcount.h	recordmcount: Correct st_shndx handling	2021-06-18 09:09:17 -04:00
recordmcount.pl	nds32: Remove the architecture	2022-03-07 13:54:59 +01:00
remove-stale-files	Kbuild updates for v5.17	2022-01-19 11:15:19 +02:00
setlocalversion	kbuild: do not quote string values in include/config/auto.conf	2022-01-08 18:03:57 +09:00
show_delta	tweewide: Fix most Shebang lines	2020-12-08 23:30:04 +09:00
sign-file.c	cert host tools: Stop complaining about deprecated OpenSSL functions	2022-06-08 13:18:39 -07:00
sorttable.c	LoongArch: Add ELF-related definitions	2022-06-03 20:09:27 +08:00
sorttable.h	script/sorttable: Fix some initialization problems	2022-01-18 10:17:18 -05:00
spdxcheck-test.sh	docs: move Linux logo into a new images folder	2022-06-01 09:32:45 -06:00
spdxcheck.py	scripts/spdxcheck: Put excluded files and directories into a separate file	2022-05-18 15:34:33 +02:00
spdxexclude	scripts/spdxcheck: Exclude top-level README	2022-05-18 15:35:42 +02:00
spelling.txt	scripts/spelling.txt: add more spellings to spelling.txt	2022-03-22 15:57:00 -07:00
sphinx-pre-install	scripts: sphinx-pre-install: Fix ctex support on Debian	2022-01-07 09:33:13 -07:00
split-man.pl	tweewide: Fix most Shebang lines	2020-12-08 23:30:04 +09:00
stackdelta
stackusage
subarch.include	LoongArch: Add build infrastructure	2022-06-03 20:09:27 +08:00
syscallhdr.sh	scripts: check duplicated syscall number in syscall table	2021-07-09 04:00:39 +09:00
syscallnr.sh	scripts: make some scripts executable	2021-08-10 09:13:25 +09:00
syscalltbl.sh	scripts: check duplicated syscall number in syscall table	2021-07-09 04:00:39 +09:00
tags.sh	scripts/tags.sh: Invoke 'realpath' via 'xargs'	2022-05-19 18:54:40 +02:00
test_fortify.sh	fortify: Update compile-time tests for Clang 14	2022-02-13 16:50:06 -08:00
tools-support-relr.sh	Makefile: fix GDB warning with CONFIG_RELR	2021-06-08 13:09:34 +01:00
unifdef.c
ver_linux	Removed the oprofiled version option	2021-05-03 17:23:06 -06:00
xen-hypercalls.sh	scripts: make some scripts executable	2021-08-10 09:13:25 +09:00
xz_wrap.sh	kbuild: add variables for compression tools	2020-06-06 23:42:01 +09:00