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author | Thomas Gleixner <tglx@linutronix.de> | 2006-01-09 20:52:30 -0800 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-10 08:01:37 -0800 |
commit | f8f46da3b4cbb03b43a102b1eb92b63419e10f90 (patch) | |
tree | e27636e88406d96ddae4687267f4854171303c8d /kernel/time.c | |
parent | 718bcceb5ad72a5def2c2fd1fa3ef964be32a857 (diff) | |
download | kernel_samsung_tuna-f8f46da3b4cbb03b43a102b1eb92b63419e10f90.zip kernel_samsung_tuna-f8f46da3b4cbb03b43a102b1eb92b63419e10f90.tar.gz kernel_samsung_tuna-f8f46da3b4cbb03b43a102b1eb92b63419e10f90.tar.bz2 |
[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.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/kernel/time.c b/kernel/time.c index c689b53..cf5a458 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) ts->tv_nsec = nsec; } +/** + * ns_to_timespec - Convert nanoseconds to timespec + * @nsec: the nanoseconds value to be converted + * + * Returns the timespec representation of the nsec parameter. + */ +inline struct timespec ns_to_timespec(const nsec_t nsec) +{ + struct timespec ts; + + if (nsec) + ts.tv_sec = div_long_long_rem_signed(nsec, NSEC_PER_SEC, + &ts.tv_nsec); + else + ts.tv_sec = ts.tv_nsec = 0; + + return ts; +} + +/** + * ns_to_timeval - Convert nanoseconds to timeval + * @nsec: the nanoseconds value to be converted + * + * Returns the timeval representation of the nsec parameter. + */ +struct timeval ns_to_timeval(const nsec_t nsec) +{ + struct timespec ts = ns_to_timespec(nsec); + struct timeval tv; + + tv.tv_sec = ts.tv_sec; + tv.tv_usec = (suseconds_t) ts.tv_nsec / 1000; + + return tv; +} + #if (BITS_PER_LONG < 64) u64 get_jiffies_64(void) { |