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sched: Make cond_resched_*lock() variants consistent vs. might_sleep() 

Commit 3427445afd ("sched: Exclude cond_resched() from nested sleep
test") removed the task state check of __might_sleep() for
cond_resched_lock() because cond_resched_lock() is not a voluntary
scheduling point which blocks. It's a preemption point which requires the
lock holder to release the spin lock.

The same rationale applies to cond_resched_rwlock_read/write(), but those
were not touched.

Make it consistent and use the non-state checking __might_resched() there
as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210923165357.991262778@linutronix.de
This commit is contained in:
Thomas Gleixner 2021-09-23 18:54:37 +02:00 committed by Peter Zijlstra
parent 874f670e60
commit 7b5ff4bb9a
1 changed files with 6 additions and 6 deletions
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12
include/linux/sched.h
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@ -2051,14 +2051,14 @@ extern int __cond_resched_rwlock_write(rwlock_t *lock);
__cond_resched_lock(lock); \
})
#define cond_resched_rwlock_read(lock) ({ \
__might_sleep(__FILE__, __LINE__, PREEMPT_LOCK_OFFSET); \
__cond_resched_rwlock_read(lock); \
#define cond_resched_rwlock_read(lock) ({ \
__might_resched(__FILE__, __LINE__, PREEMPT_LOCK_OFFSET); \
__cond_resched_rwlock_read(lock); \
})
#define cond_resched_rwlock_write(lock) ({ \
__might_sleep(__FILE__, __LINE__, PREEMPT_LOCK_OFFSET); \
__cond_resched_rwlock_write(lock); \
#define cond_resched_rwlock_write(lock) ({ \
__might_resched(__FILE__, __LINE__, PREEMPT_LOCK_OFFSET); \
__cond_resched_rwlock_write(lock); \
})
static inline void cond_resched_rcu(void)