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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2017-01-31 04:09:33 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-02-01 09:13:54 +0100 |
| commit | 715eb7a9243a058a0722aa2f6ba703ede9113e76 (patch) | |
| tree | 72ca905995e81614db673e8d929dab7322c7389b /kernel/time/posix-cpu-timers.c | |
| parent | sched/cputime: Increment kcpustat directly on irqtime account (diff) | |
| download | linux-715eb7a9243a058a0722aa2f6ba703ede9113e76.tar.xz linux-715eb7a9243a058a0722aa2f6ba703ede9113e76.zip | |
timers/posix-timers: Use TICK_NSEC instead of a dynamically ad-hoc calculated version
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1485832191-26889-18-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/time/posix-cpu-timers.c')
| -rw-r--r-- | kernel/time/posix-cpu-timers.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index d53ff711a2a8..8349e02b1c0c 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -890,8 +890,6 @@ static inline void stop_process_timers(struct signal_struct *sig) tick_dep_clear_signal(sig, TICK_DEP_BIT_POSIX_TIMER); } -static u32 onecputick; - static void check_cpu_itimer(struct task_struct *tsk, struct cpu_itimer *it, unsigned long long *expires, unsigned long long cur_time, int signo) @@ -903,9 +901,9 @@ static void check_cpu_itimer(struct task_struct *tsk, struct cpu_itimer *it, if (it->incr) { it->expires += it->incr; it->error += it->incr_error; - if (it->error >= onecputick) { + if (it->error >= TICK_NSEC) { it->expires -= cputime_one_jiffy; - it->error -= onecputick; + it->error -= TICK_NSEC; } } else { it->expires = 0; @@ -1476,15 +1474,10 @@ static __init int init_posix_cpu_timers(void) .clock_get = thread_cpu_clock_get, .timer_create = thread_cpu_timer_create, }; - struct timespec ts; posix_timers_register_clock(CLOCK_PROCESS_CPUTIME_ID, &process); posix_timers_register_clock(CLOCK_THREAD_CPUTIME_ID, &thread); - cputime_to_timespec(cputime_one_jiffy, &ts); - onecputick = ts.tv_nsec; - WARN_ON(ts.tv_sec != 0); - return 0; } __initcall(init_posix_cpu_timers); |