[patch 080/198] x86_64: Minor microoptimization in syscall entry slow path

[akpm@osdl.org]

From: "Andi Kleen" <ak@suse.de>

Minor microoptimization in syscall entry slow path

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 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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