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authorThomas Gleixner <tglx@linutronix.de>2006-01-09 23:52:30 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-10 11:01:37 -0500
commitf8f46da3b4cbb03b43a102b1eb92b63419e10f90 (patch)
treee27636e88406d96ddae4687267f4854171303c8d /kernel/time.c
parent718bcceb5ad72a5def2c2fd1fa3ef964be32a857 (diff)
[PATCH] hrtimer: introduce nsec_t type and conversion functions
- introduce the nsec_t type - basic nsec conversion routines: timespec_to_ns(), timeval_to_ns(), ns_to_timespec(), ns_to_timeval(). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/time.c')
-rw-r--r--kernel/time.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/kernel/time.c b/kernel/time.c
index c689b53297cf..cf5a4582a672 100644
--- a/kernel/time.c
+++ b/kernel/time.c
@@ -652,6 +652,42 @@ void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec)
652 ts->tv_nsec = nsec; 652 ts->tv_nsec = nsec;
653} 653}
654 654
655/**
656 * ns_to_timespec - Convert nanoseconds to timespec
657 * @nsec: the nanoseconds value to be converted
658 *
659 * Returns the timespec representation of the nsec parameter.
660 */
661inline struct timespec ns_to_timespec(const nsec_t nsec)
662{
663 struct timespec ts;
664
665 if (nsec)
666 ts.tv_sec = div_long_long_rem_signed(nsec, NSEC_PER_SEC,
667 &ts.tv_nsec);
668 else
669 ts.tv_sec = ts.tv_nsec = 0;
670
671 return ts;
672}
673
674/**
675 * ns_to_timeval - Convert nanoseconds to timeval
676 * @nsec: the nanoseconds value to be converted
677 *
678 * Returns the timeval representation of the nsec parameter.
679 */
680struct timeval ns_to_timeval(const nsec_t nsec)
681{
682 struct timespec ts = ns_to_timespec(nsec);
683 struct timeval tv;
684
685 tv.tv_sec = ts.tv_sec;
686 tv.tv_usec = (suseconds_t) ts.tv_nsec / 1000;
687
688 return tv;
689}
690
655#if (BITS_PER_LONG < 64) 691#if (BITS_PER_LONG < 64)
656u64 get_jiffies_64(void) 692u64 get_jiffies_64(void)
657{ 693{