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| author | Ingo Molnar <mingo@elte.hu> | 2008-12-16 22:04:48 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-16 22:04:48 +0100 |
| commit | 78f902ccc597d6ce3e8d1477d70f2d79e960ba7a (patch) | |
| tree | c6ceab663de16501d1dda1c1596fe2dacaaef8e3 /arch/x86/kernel/tsc_sync.c | |
| parent | 9ee670fd87b7d69c8633b94c42aadcbbcb96f28e (diff) | |
| parent | 8b1fae4e4200388b64dd88065639413cb3f1051c (diff) | |
Merge commit 'v2.6.28-rc8' into x86/doc
Diffstat (limited to 'arch/x86/kernel/tsc_sync.c')
| -rw-r--r-- | arch/x86/kernel/tsc_sync.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/tsc_sync.c b/arch/x86/kernel/tsc_sync.c index 9ffb01c31c40..1c0dfbca87c1 100644 --- a/arch/x86/kernel/tsc_sync.c +++ b/arch/x86/kernel/tsc_sync.c @@ -46,7 +46,9 @@ static __cpuinit void check_tsc_warp(void) cycles_t start, now, prev, end; int i; + rdtsc_barrier(); start = get_cycles(); + rdtsc_barrier(); /* * The measurement runs for 20 msecs: */ @@ -61,7 +63,9 @@ static __cpuinit void check_tsc_warp(void) */ __raw_spin_lock(&sync_lock); prev = last_tsc; + rdtsc_barrier(); now = get_cycles(); + rdtsc_barrier(); last_tsc = now; __raw_spin_unlock(&sync_lock); |