Merge branch 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-omap-h63xx.git] / arch / x86 / kernel / tsc_sync.c

diff --git a/arch/x86/kernel/tsc_sync.c b/arch/x86/kernel/tsc_sync.c
index 9ffb01c31c40a8c9083e9949d065a442a62f46b7..1c0dfbca87c18a05beb42cebaa8e9ffed6d508a1 100644 (file)
--- 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);