Messages in this thread Patch in this message | | | Date | Tue, 7 Sep 2021 12:34:58 +0200 | From | Sebastian Andrzej Siewior <> | Subject | [PATCH] locking: Remove rt_rwlock_is_contended() |
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rt_rwlock_is_contended() has not users. It makes no sense to use it as rwlock_is_contended() because it is a sleeping lock on RT and preemption is possible. It reports always != 0 if used by a writer and even if there is a waiter then the lock might not be handed over if the current owner has the highest priority.
Remove rt_rwlock_is_contended().
Reported-by: kernel test robot <lkp@intel.com> Fixes: 8282947f67345 ("locking/rwlock: Provide RT variant") Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> --- kernel/locking/spinlock_rt.c | 6 ------ 1 file changed, 6 deletions(-)
--- a/kernel/locking/spinlock_rt.c +++ b/kernel/locking/spinlock_rt.c @@ -246,12 +246,6 @@ void __sched rt_write_unlock(rwlock_t *r } EXPORT_SYMBOL(rt_write_unlock); -int __sched rt_rwlock_is_contended(rwlock_t *rwlock) -{ - return rw_base_is_contended(&rwlock->rwbase); -} -EXPORT_SYMBOL(rt_rwlock_is_contended); - #ifdef CONFIG_DEBUG_LOCK_ALLOC void __rt_rwlock_init(rwlock_t *rwlock, const char *name, struct lock_class_key *key)
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