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posix-cpu-timers: Consolidate timer base accessor

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Remove the ad-hoc timer base accessors and provide a consolidated one.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210726125513.271824-6-frederic@kernel.org
This commit is contained in:
Frederic Weisbecker 2021-07-26 14:55:12 +02:00 committed by Thomas Gleixner
parent d9c1b2a108
commit 5c8f23e6b7
1 changed files with 13 additions and 15 deletions
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28
kernel/time/posix-cpu-timers.c
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@ -407,6 +407,17 @@ static int posix_cpu_timer_create(struct k_itimer *new_timer)
return 0;
}
static struct posix_cputimer_base *timer_base(struct k_itimer *timer,
struct task_struct *tsk)
{
int clkidx = CPUCLOCK_WHICH(timer->it_clock);
if (CPUCLOCK_PERTHREAD(timer->it_clock))
return tsk->posix_cputimers.bases + clkidx;
else
return tsk->signal->posix_cputimers.bases + clkidx;
}
/*
* Dequeue the timer and reset the base if it was its earliest expiration.
* It makes sure the next tick recalculates the base next expiration so we
@ -421,18 +432,11 @@ static void disarm_timer(struct k_itimer *timer, struct task_struct *p)
{
struct cpu_timer *ctmr = &timer->it.cpu;
struct posix_cputimer_base *base;
int clkidx;
if (!cpu_timer_dequeue(ctmr))
return;
clkidx = CPUCLOCK_WHICH(timer->it_clock);
if (CPUCLOCK_PERTHREAD(timer->it_clock))
base = p->posix_cputimers.bases + clkidx;
else
base = p->signal->posix_cputimers.bases + clkidx;
base = timer_base(timer, p);
if (cpu_timer_getexpires(ctmr) == base->nextevt)
base->nextevt = 0;
}
@ -531,15 +535,9 @@ void posix_cpu_timers_exit_group(struct task_struct *tsk)
*/
static void arm_timer(struct k_itimer *timer, struct task_struct *p)
{
int clkidx = CPUCLOCK_WHICH(timer->it_clock);
struct posix_cputimer_base *base = timer_base(timer, p);
struct cpu_timer *ctmr = &timer->it.cpu;
u64 newexp = cpu_timer_getexpires(ctmr);
struct posix_cputimer_base *base;
if (CPUCLOCK_PERTHREAD(timer->it_clock))
base = p->posix_cputimers.bases + clkidx;
else
base = p->signal->posix_cputimers.bases + clkidx;
if (!cpu_timer_enqueue(&base->tqhead, ctmr))
return;