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Commit 4da1ce6d authored by Ingo Molnar's avatar Ingo Molnar
Browse files

sched: add in_atomic_preempt_off() 



add in_atomic_preempt_off() - debugging helper that will
simplify schedule().

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent f64f6114

include/linux/hardirq.h

+13 −0
Original line number Diff line number Diff line
@@ -78,6 +78,19 @@ 
# define in_atomic()	((preempt_count() & ~PREEMPT_ACTIVE) != 0)

#endif



#ifdef CONFIG_PREEMPT

# define PREEMPT_CHECK_OFFSET 1

#else

# define PREEMPT_CHECK_OFFSET 0

#endif



/*

 * Check whether we were atomic before we did preempt_disable():

 * (used by the scheduler)

 */

#define in_atomic_preempt_off() \

		((preempt_count() & ~PREEMPT_ACTIVE) != PREEMPT_CHECK_OFFSET)



#ifdef CONFIG_PREEMPT

# define preemptible()	(preempt_count() == 0 && !irqs_disabled())

# define IRQ_EXIT_OFFSET (HARDIRQ_OFFSET-1)