posix-cpu-timers: Use clock ID in posix_cpu_timer_set()

Extract the clock ID (PROF/VIRT/SCHED) from the clock selector and use it
as argument to the sample functions. That allows to simplify them once all
callers are fixed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lkml.kernel.org/r/20190821192920.050770464@linutronix.de

diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c
index a9003b2..12561f8 100644 (file)
--- a/kernel/time/posix-cpu-timers.c
+++ b/kernel/time/posix-cpu-timers.c
@@ -556,10 +556,11 @@ static void cpu_timer_fire(struct k_itimer *timer)
 static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags,
                               struct itimerspec64 *new, struct itimerspec64 *old)
 {
-       unsigned long flags;
-       struct sighand_struct *sighand;
-       struct task_struct *p = timer->it.cpu.task;
+       clockid_t clkid = CPUCLOCK_WHICH(timer->it_clock);
        u64 old_expires, new_expires, old_incr, val;
+       struct task_struct *p = timer->it.cpu.task;
+       struct sighand_struct *sighand;
+       unsigned long flags;
        int ret;
 
        if (WARN_ON_ONCE(!p))
@@ -606,9 +607,9 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags,
         * check if it's already passed.  In short, we need a sample.
         */
        if (CPUCLOCK_PERTHREAD(timer->it_clock)) {
-               cpu_clock_sample(timer->it_clock, p, &val);
+               cpu_clock_sample(clkid, p, &val);
        } else {
-               cpu_clock_sample_group(timer->it_clock, p, &val, true);
+               cpu_clock_sample_group(clkid, p, &val, true);
        }
 
        if (old) {