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locking: Remove rt_rwlock_is_contended(). 

Bugzilla: http://bugzilla.redhat.com/2062831

commit e08f343be00c3fe8f9f6ac58085c81bcdd231fab
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Mon Nov 29 18:46:45 2021 +0100

    locking: Remove rt_rwlock_is_contended().

    rt_rwlock_is_contended() has no 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>
    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
    Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
    Link: https://lore.kernel.org/r/20211129174654.668506-3-bigeasy@linutronix.de

Signed-off-by: Phil Auld <pauld@redhat.com>
This commit is contained in:
Phil Auld 2022-03-22 16:26:44 -04:00
parent 2d595edebf
commit d857bb519d
1 changed files with 0 additions and 6 deletions
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6
kernel/locking/spinlock_rt.c
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@ -246,12 +246,6 @@ void __sched rt_write_unlock(rwlock_t *rwlock)
}
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)