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| author | Andy Lutomirski <[email protected]> | 2015-10-06 00:48:24 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2015-10-09 07:41:13 +0000 |
| commit | f5e6a9753ac2965564a14e6285a06f44043ed9c8 (patch) | |
| tree | 0582fb04b19ee92de88288a28f214d07db5abda7 /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | x86/entry: Split and inline prepare_exit_to_usermode() (diff) | |
| download | kernel-f5e6a9753ac2965564a14e6285a06f44043ed9c8.tar.gz kernel-f5e6a9753ac2965564a14e6285a06f44043ed9c8.zip | |
x86/entry: Split and inline syscall_return_slowpath()
GCC is unable to properly optimize functions that have a very
short likely case and a longer and register-heavier cold part --
it fails to sink all of the register saving and stack frame
setup code into the unlikely part.
Help it out with syscall_return_slowpath() by splitting it into
two parts and inline the hot part.
Saves 6 cycles for compat syscalls.
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/0f773a894ab15c589ac794c2d34ca6ba9b5335c9.1444091585.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
0 files changed, 0 insertions, 0 deletions