cputime: Optimize jiffies_to_cputime(1)

[deliverable/linux.git] / kernel / posix-cpu-timers.c

diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 69c92374355fb84bc432aed4e825f6f16d260dac..18bdde6f676fa80c9cf64c59ff2f055c7fc4534c 100644 (file)
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -1086,7 +1086,7 @@ static void check_cpu_itimer(struct task_struct *tsk, struct cpu_itimer *it,
                        it->error += it->incr_error;
                        if (it->error >= onecputick) {
                                it->expires = cputime_sub(it->expires,
-                                                       jiffies_to_cputime(1));
+                                                         cputime_one_jiffy);
                                it->error -= onecputick;
                        }
                } else
@@ -1461,7 +1461,7 @@ void set_process_cpu_timer(struct task_struct *tsk, unsigned int clock_idx,
                if (!cputime_eq(*oldval, cputime_zero)) {
                        if (cputime_le(*oldval, now.cpu)) {
                                /* Just about to fire. */
-                               *oldval = jiffies_to_cputime(1);
+                               *oldval = cputime_one_jiffy;
                        } else {
                                *oldval = cputime_sub(*oldval, now.cpu);
                        }
@@ -1712,7 +1712,7 @@ static __init int init_posix_cpu_timers(void)
        register_posix_clock(CLOCK_PROCESS_CPUTIME_ID, &process);
        register_posix_clock(CLOCK_THREAD_CPUTIME_ID, &thread);
 
-       cputime_to_timespec(jiffies_to_cputime(1), &ts);
+       cputime_to_timespec(cputime_one_jiffy, &ts);
        onecputick = ts.tv_nsec;
        WARN_ON(ts.tv_sec != 0);