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authorjohn stultz <johnstul@us.ibm.com>2007-07-24 20:47:43 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-25 13:09:20 -0400
commit2c6b47de17c75d553de3e2fb426d8298d2074585 (patch)
treec8edc3d727d85cb3e1c043583c350a04a133e1a3 /kernel/time/timekeeping.c
parent0de085bb474f64e4fdb2f1ff3268590792648c7b (diff)
Cleanup non-arch xtime uses, use get_seconds() or current_kernel_time().
This avoids use of the kernel-internal "xtime" variable directly outside of the actual time-related functions. Instead, use the helper functions that we already have available to us. This doesn't actually change any behaviour, but this will allow us to fix the fact that "xtime" isn't updated very often with CONFIG_NO_HZ (because much of the realtime information is maintained as separate offsets to 'xtime'), which has caused interfaces that use xtime directly to get a time that is out of sync with the real-time clock by up to a third of a second or so. Signed-off-by: John Stultz <johnstul@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/time/timekeeping.c')
-rw-r--r--kernel/time/timekeeping.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 88c81026e003..07a3f1420c27 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -509,3 +509,19 @@ void monotonic_to_bootbased(struct timespec *ts)
509{ 509{
510 ts->tv_sec += total_sleep_time; 510 ts->tv_sec += total_sleep_time;
511} 511}
512
513struct timespec current_kernel_time(void)
514{
515 struct timespec now;
516 unsigned long seq;
517
518 do {
519 seq = read_seqbegin(&xtime_lock);
520
521 now = xtime;
522 } while (read_seqretry(&xtime_lock, seq));
523
524 return now;
525}
526
527EXPORT_SYMBOL(current_kernel_time);