sched/rt: Add schedule_preempt_disabled()
Add helper to get rid of the ever repeating: preempt_enable_no_resched(); schedule(); preempt_disable(); patterns. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-wxx7btox7coby6ifv5vzhzgp@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -361,6 +361,7 @@ extern signed long schedule_timeout_interruptible(signed long timeout);
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extern signed long schedule_timeout_killable(signed long timeout);
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extern signed long schedule_timeout_uninterruptible(signed long timeout);
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asmlinkage void schedule(void);
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extern void schedule_preempt_disabled(void);
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extern int mutex_spin_on_owner(struct mutex *lock, struct task_struct *owner);
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struct nsproxy;
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@ -3246,6 +3246,18 @@ asmlinkage void __sched schedule(void)
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}
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EXPORT_SYMBOL(schedule);
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/**
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* schedule_preempt_disabled - called with preemption disabled
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*
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* Returns with preemption disabled. Note: preempt_count must be 1
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*/
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void __sched schedule_preempt_disabled(void)
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{
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preempt_enable_no_resched();
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schedule();
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preempt_disable();
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}
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#ifdef CONFIG_MUTEX_SPIN_ON_OWNER
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static inline bool owner_running(struct mutex *lock, struct task_struct *owner)
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