From: Thomas Gleixner Date: Fri, 8 Sep 2023 18:22:50 +0200 Subject: [PATCH 3/7] sched: Extract __schedule_loop() Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.6/older/patches-6.6.7-rt18.tar.xz There are currently two implementations of this basic __schedule() loop, and there is soon to be a third. Signed-off-by: Thomas Gleixner Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Peter Zijlstra (Intel) Link: https://lkml.kernel.org/r/20230908162254.999499-4-bigeasy@linutronix.de --- kernel/sched/core.c | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6771,16 +6771,21 @@ static void sched_update_worker(struct t } } -asmlinkage __visible void __sched schedule(void) +static __always_inline void __schedule_loop(unsigned int sched_mode) { - struct task_struct *tsk = current; - - sched_submit_work(tsk); do { preempt_disable(); - __schedule(SM_NONE); + __schedule(sched_mode); sched_preempt_enable_no_resched(); } while (need_resched()); +} + +asmlinkage __visible void __sched schedule(void) +{ + struct task_struct *tsk = current; + + sched_submit_work(tsk); + __schedule_loop(SM_NONE); sched_update_worker(tsk); } EXPORT_SYMBOL(schedule); @@ -6844,11 +6849,7 @@ void __sched schedule_preempt_disabled(v #ifdef CONFIG_PREEMPT_RT void __sched notrace schedule_rtlock(void) { - do { - preempt_disable(); - __schedule(SM_RTLOCK_WAIT); - sched_preempt_enable_no_resched(); - } while (need_resched()); + __schedule_loop(SM_RTLOCK_WAIT); } NOKPROBE_SYMBOL(schedule_rtlock); #endif