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| author | Li RongQing <lirongqing@baidu.com> | 2019-02-28 13:13:26 +0800 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-04-08 22:56:14 +0200 |
| commit | 3b15d09f7e6db44065aaba5fd16dc7420035c5ad (patch) | |
| tree | a0c490bd2ca02e475ab4b92dc7e86092a6e0d758 /kernel/time | |
| parent | ed514fc5615d7688b7c227a76863e98a92fb0d54 (diff) | |
| download | linux-3b15d09f7e6db44065aaba5fd16dc7420035c5ad.tar.bz2 | |
time: Introduce jiffies64_to_msecs()
there is a similar helper in net/netfilter/nf_tables_api.c,
this maybe become a common request someday, so move it to
time.c
Signed-off-by: Zhang Yu <zhangyu31@baidu.com>
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Acked-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/time.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/time/time.c b/kernel/time/time.c index c3f756f8534b..9e3f79d4f5a8 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -783,6 +783,16 @@ u64 jiffies64_to_nsecs(u64 j) } EXPORT_SYMBOL(jiffies64_to_nsecs); +u64 jiffies64_to_msecs(const u64 j) +{ +#if HZ <= MSEC_PER_SEC && !(MSEC_PER_SEC % HZ) + return (MSEC_PER_SEC / HZ) * j; +#else + return div_u64(j * HZ_TO_MSEC_NUM, HZ_TO_MSEC_DEN); +#endif +} +EXPORT_SYMBOL(jiffies64_to_msecs); + /** * nsecs_to_jiffies64 - Convert nsecs in u64 to jiffies64 * |