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| author |   Ingo Molnar <mingo@elte.hu> | 2008-11-08 20:23:02 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-08 20:23:02 +0100 |
| commit | 895e031707954a9ca26ed4f5f794575313854ed1 (patch) | |
| tree | ec7cd5515f346e6f94bc43e63d55ebc8ddf4173d /arch/x86/include/asm/tsc.h | |
| parent | x86: Implement change_bit with immediate operand as "lock xorb" (diff) | |
| parent | Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip (diff) | |
| download | linux-dev-895e031707954a9ca26ed4f5f794575313854ed1.tar.xz linux-dev-895e031707954a9ca26ed4f5f794575313854ed1.zip | |
Merge branch 'linus' into x86/cleanups
Diffstat (limited to 'arch/x86/include/asm/tsc.h')
| -rw-r--r-- | arch/x86/include/asm/tsc.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/include/asm/tsc.h b/arch/x86/include/asm/tsc.h index 38ae163cc91b..9cd83a8e40d5 100644 --- a/arch/x86/include/asm/tsc.h +++ b/arch/x86/include/asm/tsc.h @@ -34,6 +34,8 @@ static inline cycles_t get_cycles(void) static __always_inline cycles_t vget_cycles(void) { + cycles_t cycles; + /* * We only do VDSOs on TSC capable CPUs, so this shouldnt * access boot_cpu_data (which is not VDSO-safe): @@ -42,7 +44,11 @@ static __always_inline cycles_t vget_cycles(void) if (!cpu_has_tsc) return 0; #endif - return (cycles_t)__native_read_tsc(); + rdtsc_barrier(); + cycles = (cycles_t)__native_read_tsc(); + rdtsc_barrier(); + + return cycles; } extern void tsc_init(void); |