From 09d888b5d67f691f5f46c631146a61f18584f260 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 28 Feb 2020 11:09:46 -0600 Subject: [PATCH] posix-cpu-timers: Pass the task into arm_timer() The task has been already computed to take siglock before calling arm_timer. So pass the benefit of that labor into arm_timer(). Signed-off-by: "Eric W. Biederman" Signed-off-by: Thomas Gleixner Link: https://lkml.kernel.org/r/8736auvdt1.fsf@x220.int.ebiederm.org --- kernel/time/posix-cpu-timers.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 40c2d8396bb9d..ef936c5a910b9 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -482,12 +482,11 @@ void posix_cpu_timers_exit_group(struct task_struct *tsk) * Insert the timer on the appropriate list before any timers that * expire later. This must be called with the sighand lock held. */ -static void arm_timer(struct k_itimer *timer) +static void arm_timer(struct k_itimer *timer, struct task_struct *p) { int clkidx = CPUCLOCK_WHICH(timer->it_clock); struct cpu_timer *ctmr = &timer->it.cpu; u64 newexp = cpu_timer_getexpires(ctmr); - struct task_struct *p = ctmr->task; struct posix_cputimer_base *base; if (CPUCLOCK_PERTHREAD(timer->it_clock)) @@ -660,7 +659,7 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags, */ cpu_timer_setexpires(ctmr, new_expires); if (new_expires != 0 && val < new_expires) { - arm_timer(timer); + arm_timer(timer, p); } unlock_task_sighand(p, &flags); @@ -980,7 +979,7 @@ static void posix_cpu_timer_rearm(struct k_itimer *timer) /* * Now re-arm for the new expiry time. */ - arm_timer(timer); + arm_timer(timer, p); unlock_task_sighand(p, &flags); } -- 2.39.5