Messages in this thread Patch in this message | | | Subject | [patch 080/198] x86_64: Minor microoptimization in syscall entry slow path | From | akpm@osdl ... | Date | Tue, 12 Apr 2005 03:31:49 -0700 |
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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: _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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