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| author | Paul Mackerras <paulus@samba.org> | 2008-12-03 20:11:06 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-12-03 20:11:06 +1100 |
| commit | 527491885554002837b5742202adc0ab5f536e54 (patch) | |
| tree | 6d9c44776e0b4368eccd414b92b957fac3c5a4c6 /arch/x86/kernel/tsc_sync.c | |
| parent | cea555d384b85271035814c5adad23e6c7fc5d2a (diff) | |
| parent | 2434bbb30e79468c49cff3cff6005236f55ed188 (diff) | |
Merge branch 'merge'
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 9ffb01c31c4..1c0dfbca87c 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); |