From: davej@codemonkey.org.uk
To: torvalds@transmeta.com
Cc: linux-kernel@vger.kernel.org
Subject: mark context switch wrmsr path unlikely
Date: Mon, 24 Mar 2003 16:41:57 +0000 [thread overview]
Message-ID: <200303241642.h2OGgA35008324@deviant.impure.org.uk> (raw)
diff -urpN --exclude-from=/home/davej/.exclude bk-linus/include/asm-i386/processor.h linux-2.5/include/asm-i386/processor.h
--- bk-linus/include/asm-i386/processor.h 2003-03-21 12:53:30.000000000 +0000
+++ linux-2.5/include/asm-i386/processor.h 2003-03-21 13:45:20.000000000 +0000
@@ -419,7 +419,7 @@ static inline void load_esp0(struct tss_
{
tss->esp0 = esp0;
/* This can only happen when SEP is enabled, no need to test "SEP"arately */
- if (tss->ss1 != __KERNEL_CS) {
+ if ((unlikely(tss->ss1 != __KERNEL_CS))) {
tss->ss1 = __KERNEL_CS;
wrmsr(MSR_IA32_SYSENTER_CS, __KERNEL_CS, 0);
}
reply other threads:[~2003-03-24 17:15 UTC|newest]
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