diff options
| author |   David Woodhouse <dwmw@amazon.co.uk> | 2018-02-19 10:50:57 +0000 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2018-02-20 11:17:58 +0100 |
| commit | 87358710c1fb4f1bf96bbe2349975ff9953fc9b2 (patch) | |
| tree | e299a6ab64aadb44ffd431ae8342e0ae0b266cba /include/linux/compiler-gcc.h | |
| parent | x86/speculation: Use IBRS if available before calling into firmware (diff) | |
| download | linux-dev-87358710c1fb4f1bf96bbe2349975ff9953fc9b2.tar.xz linux-dev-87358710c1fb4f1bf96bbe2349975ff9953fc9b2.zip | |
x86/retpoline: Support retpoline builds with Clang
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: arjan.van.de.ven@intel.com
Cc: bp@alien8.de
Cc: dave.hansen@intel.com
Cc: jmattson@google.com
Cc: karahmed@amazon.de
Cc: kvm@vger.kernel.org
Cc: pbonzini@redhat.com
Cc: rkrcmar@redhat.com
Link: http://lkml.kernel.org/r/1519037457-7643-5-git-send-email-dwmw@amazon.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/compiler-gcc.h')
| -rw-r--r-- | include/linux/compiler-gcc.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index 73bc63e0a1c4..673fbf904fe5 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -93,6 +93,10 @@ #define __weak __attribute__((weak)) #define __alias(symbol) __attribute__((alias(#symbol))) +#ifdef RETPOLINE +#define __noretpoline __attribute__((indirect_branch("keep"))) +#endif + /* * it doesn't make sense on ARM (currently the only user of __naked) * to trace naked functions because then mcount is called without |