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| author | Len Brown <len.brown@intel.com> | 2009-09-19 00:06:59 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-09-19 00:06:59 -0400 |
| commit | 71fd68e7d234f6b7d8407c8f486764d24f8411f4 (patch) | |
| tree | 6dc2a4c356b4f454fc85d0c7cb019986f6f4993b /kernel/time.c | |
| parent | 8ff0e082f0833d32c7523a6cd72b6cf6a2142ce8 (diff) | |
| parent | 78f28b7c555359c67c2a0d23f7436e915329421e (diff) | |
| download | lwn-71fd68e7d234f6b7d8407c8f486764d24f8411f4.tar.gz lwn-71fd68e7d234f6b7d8407c8f486764d24f8411f4.zip | |
Merge branch 'linus' into release
Diffstat (limited to 'kernel/time.c')
| -rw-r--r-- | kernel/time.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/time.c b/kernel/time.c index 29511943871a..2e2e469a7fec 100644 --- a/kernel/time.c +++ b/kernel/time.c @@ -370,13 +370,20 @@ EXPORT_SYMBOL(mktime); * 0 <= tv_nsec < NSEC_PER_SEC * For negative values only the tv_sec field is negative ! */ -void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec) +void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec) { while (nsec >= NSEC_PER_SEC) { + /* + * The following asm() prevents the compiler from + * optimising this loop into a modulo operation. See + * also __iter_div_u64_rem() in include/linux/time.h + */ + asm("" : "+rm"(nsec)); nsec -= NSEC_PER_SEC; ++sec; } while (nsec < 0) { + asm("" : "+rm"(nsec)); nsec += NSEC_PER_SEC; --sec; } |