x86: remove get_cycles_sync

rdtsc is now speculation-safe, so no need for the sync variants of
the APIs.

[ mingo@elte.hu: removed the nsec_barrier() complication. ]

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/kernel/tsc_sync.c b/arch/x86/kernel/tsc_sync.c
index 05d8f25de6ae..ace340524c01 100644
--- a/arch/x86/kernel/tsc_sync.c
+++ b/arch/x86/kernel/tsc_sync.c
@@ -46,7 +46,7 @@ static __cpuinit void check_tsc_warp(void)
         cycles_t start, now, prev, end;
         int i;
 
-        start = get_cycles_sync();
+        start = get_cycles();
         /*
          * The measurement runs for 20 msecs:
          */
@@ -61,7 +61,7 @@ static __cpuinit void check_tsc_warp(void)
                  */
                 __raw_spin_lock(&sync_lock);
                 prev = last_tsc;
-                now = get_cycles_sync();
+                now = get_cycles();
                 last_tsc = now;
                 __raw_spin_unlock(&sync_lock);