time: Clean up warp_clock()

warp_clock() currently accesses timekeeping internal state directly, which
is unnecessary.  Convert it to use the proper timekeeping interfaces.

Signed-off-by: John Stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 5 insertions, 6 deletions

diff --git a/kernel/time.c b/kernel/time.c
index 804798005d19..2358a3646a63 100644
--- a/kernel/time.c
+++ b/kernel/time.c
@@ -133,12 +133,11 @@ SYSCALL_DEFINE2(gettimeofday, struct timeval __user *, tv,
  */
 static inline void warp_clock(void)
 {
-        write_seqlock_irq(&xtime_lock);
-        wall_to_monotonic.tv_sec -= sys_tz.tz_minuteswest * 60;
-        xtime.tv_sec += sys_tz.tz_minuteswest * 60;
-        update_xtime_cache(0);
-        write_sequnlock_irq(&xtime_lock);
-        clock_was_set();
+        struct timespec delta, adjust;
+        delta.tv_sec = sys_tz.tz_minuteswest * 60;
+        delta.tv_nsec = 0;
+        adjust = timespec_add_safe(current_kernel_time(), delta);
+        do_settimeofday(&adjust);
 }
 
 /*