forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Couple of items for 3.20

Browse source 
* ktime division optimization
 * Expose a few more y2038-safe timekeeping interfaces
 * RTC core changes to address y2038
 
 Signed-off-by: John Stultz <john.stultz@linaro.org>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQEcBAABAgAGBQJUwvXJAAoJEK8vClot3jMxTAoH/1DMT3fuVx6RFjKJ/P1abIB+
 +w3cfEgEWgkSwYmuS0XHq1WppnQ0p0n1GOJcWUPiP9tTGrKcTdp5uG5qMprcga3q
 XoeR8wefkyEKyH4ukStdGKQKot2Vj117TauDtVNPf2eOOBS5pqOw1dYUlwjlMtOj
 45poW5ORNKmBMn90e22k8nlNSI9PebvMh9w6nzeYJWEibdyk96z2TOk1puPTvws/
 ppyNzlhnKckpNb49JVxE8B4DNRpXsUV+aUxRNyRPN4OdqCGzHwIJCyEKi6+nbRyb
 4HMUhfl8eRB2Iu7zHF2a2XEOqJdOjl8i1DsTwr3Vwd3crf4XkXD6WtTtGl2YKkU=
 =YhDu
 -----END PGP SIGNATURE-----

Merge tag 'fortglx-3.20-time' of https://git.linaro.org/people/john.stultz/linux into timers/core

Pull time updates from John Stultz for 3.20:

 * ktime division optimization
 * Expose a few more y2038-safe timekeeping interfaces
 * RTC core changes to address y2038
This commit is contained in:
Thomas Gleixner 2015-01-24 10:11:12 +01:00
commit fe31fca35d
10 changed files with 63 additions and 46 deletions
Download patch file Download diff file Expand all files Collapse all files

12
include/linux/ktime.h
View file

@ -166,7 +166,17 @@ static inline bool ktime_before(const ktime_t cmp1, const ktime_t cmp2)
}
#if BITS_PER_LONG < 64
extern u64 ktime_divns(const ktime_t kt, s64 div);
extern u64 __ktime_divns(const ktime_t kt, s64 div);
static inline u64 ktime_divns(const ktime_t kt, s64 div)
{
if (__builtin_constant_p(div) && !(div >> 32)) {
u64 ns = kt.tv64;
do_div(ns, div);
return ns;
} else {
return __ktime_divns(kt, div);
}
}
#else /* BITS_PER_LONG < 64 */
# define ktime_divns(kt, div) (u64)((kt).tv64 / (div))
#endif