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| author | Lachlan McIlroy <lachlan@redback.melbourne.sgi.com> | 2008-11-28 15:23:52 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@redback.melbourne.sgi.com> | 2008-11-28 15:23:52 +1100 |
| commit | b5a20aa2657063cbf3b47fc700603180de4bb554 (patch) | |
| tree | 9419fb851cda53a7f1fd67a3697bdf8550df19e4 /arch/x86/include/asm/tsc.h | |
| parent | cc09c0dc57de7f7d2ed89d480b5653e5f6a32f2c (diff) | |
| parent | ed313489badef16d700f5a3be50e8fd8f8294bc8 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
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 38ae163cc91..9cd83a8e40d 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); |