From: "Andi Kleen" <[email protected]>
Minor microoptimization in syscall entry slow path
Signed-off-by: Andi Kleen <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
25-akpm/arch/x86_64/kernel/entry.S | 4 +---
1 files changed, 1 insertion(+), 3 deletions(-)
diff -puN arch/x86_64/kernel/entry.S~x86_64-minor-microoptimization-in-syscall-entry-slow-path arch/x86_64/kernel/entry.S
--- 25/arch/x86_64/kernel/entry.S~x86_64-minor-microoptimization-in-syscall-entry-slow-path 2005-04-12 03:21:22.425727672 -0700
+++ 25-akpm/arch/x86_64/kernel/entry.S 2005-04-12 03:21:22.429727064 -0700
@@ -302,9 +302,7 @@ int_very_careful:
leaq 8(%rsp),%rdi # &ptregs -> arg1
call syscall_trace_leave
popq %rdi
- btr $TIF_SYSCALL_TRACE,%edi
- btr $TIF_SYSCALL_AUDIT,%edi
- btr $TIF_SINGLESTEP,%edi
+ andl $~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP),%edi
jmp int_restore_rest
int_signal:
_
-
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