From: akpm@osdl.org
To: torvalds@osdl.org
Cc: linux-kernel@vger.kernel.org, akpm@osdl.org, ak@suse.de
Subject: [patch 080/198] x86_64: Minor microoptimization in syscall entry slow path
Date: Tue, 12 Apr 2005 03:31:49 -0700 [thread overview]
Message-ID: <200504121031.j3CAVttS005447@shell0.pdx.osdl.net> (raw)
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:
_
reply other threads:[~2005-04-12 19:43 UTC|newest]
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