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linux/arch/powerpc/lib
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Josh Poimboeuf b9eab08d01 powerpc/modules: Don't try to restore r2 after a sibling call 
When attempting to load a livepatch module, I got the following error:

  module_64: patch_module: Expect noop after relocate, got 3c820000

The error was triggered by the following code in
unregister_netdevice_queue():

  14c:   00 00 00 48     b       14c <unregister_netdevice_queue+0x14c>
                         14c: R_PPC64_REL24      net_set_todo
  150:   00 00 82 3c     addis   r4,r2,0

GCC didn't insert a nop after the branch to net_set_todo() because it's
a sibling call, so it never returns.  The nop isn't needed after the
branch in that case.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-and-tested-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-12-11 13:03:29 +11:00
..
alloc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
checksum_32.S powerpc: EX_TABLE macro for exception tables 2016-11-14 11:11:51 +11:00
checksum_64.S powerpc/64: Use optimized checksum routines on little-endian 2017-01-25 13:34:18 +11:00
checksum_wrappers.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
code-patching.c powerpc/modules: Don't try to restore r2 after a sibling call 2017-12-11 13:03:29 +11:00
copy_32.S powerpc/32: remove a NOP from memset() 2017-09-01 16:42:46 +10:00
copypage_64.S powerpc/64: Fix naming of cache block vs. cache line 2017-02-06 19:46:04 +11:00
copypage_power7.S powerpc: Fix invalid use of register expressions 2017-08-10 22:29:41 +10:00
copyuser_64.S powerpc: get rid of zeroing, switch to RAW_COPY_USER 2017-04-06 15:08:42 -04:00
copyuser_power7.S powerpc: Fix invalid use of register expressions 2017-08-10 22:29:41 +10:00
crtsavres.S powerpc/64: Do not create new section for save/restore functions 2017-05-30 14:59:51 +10:00
div64.S
feature-fixups-test.S powerpc: Ensure the else case of feature sections will fit 2011-01-21 14:08:33 +11:00
feature-fixups.c powerpc: make feature-fixup tests fortify-safe 2017-07-12 16:26:03 -07:00
hweight_64.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
ldstfp.S powerpc: Fix kernel crash in emulation of vector loads and stores 2017-09-04 19:38:07 +10:00
locks.c powerpc/spinlock: Fix spin_unlock_wait() 2016-06-14 16:05:44 +10:00
Makefile powerpc updates for 4.15 2017-11-16 12:47:46 -08:00
mem_64.S powerpc/string: Implement optimized memset variants 2017-08-17 23:04:35 +10:00
memcmp_64.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
memcpy_64.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
memcpy_power7.S powerpc: Fix invalid use of register expressions 2017-08-10 22:29:41 +10:00
pmem.c powerpc/lib: Implement UACCESS_FLUSHCACHE API 2017-11-13 08:00:31 +11:00
quad.S powerpc: Handle most loads and stores in instruction emulation code 2017-09-01 16:39:48 +10:00
rheap.c powerpc: Various typo fixes 2016-06-14 13:58:26 +10:00
sstep.c powerpc/kprobes: Blacklist emulate_update_regs() from kprobes 2017-11-12 23:51:42 +11:00
string_64.S powerpc: Fix invalid use of register expressions 2017-08-10 22:29:41 +10:00
string.S powerpc: EX_TABLE macro for exception tables 2016-11-14 11:11:51 +11:00
test_emulate_step.c powerpc: emulate_step() tests for load/store instructions 2017-03-03 11:24:50 +11:00
vmx-helper.c powerpc: Introduce asm-prototypes.h 2016-06-16 22:39:54 +10:00
xor_vmx_glue.c powerpc/lib/xor_vmx: Ensure no altivec code executes before enable_kernel_altivec() 2017-06-02 20:17:52 +10:00
xor_vmx.c powerpc/lib/xor_vmx: Ensure no altivec code executes before enable_kernel_altivec() 2017-06-02 20:17:52 +10:00
xor_vmx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00