diff options
| author |   Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2021-11-29 18:46:45 +0100 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2021-12-04 10:56:23 +0100 |
| commit | e08f343be00c3fe8f9f6ac58085c81bcdd231fab (patch) | |
| tree | 21b69eed3e05757b650b5f8e7ec32da894773779 | |
| parent | sched: Trigger warning if ->migration_disabled counter underflows. (diff) | |
| download | linux-dev-e08f343be00c3fe8f9f6ac58085c81bcdd231fab.tar.xz linux-dev-e08f343be00c3fe8f9f6ac58085c81bcdd231fab.zip | |
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
| -rw-r--r-- | kernel/locking/spinlock_rt.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/kernel/locking/spinlock_rt.c b/kernel/locking/spinlock_rt.c index b2e553f9255b..9e396a09fe0f 100644 --- a/kernel/locking/spinlock_rt.c +++ b/kernel/locking/spinlock_rt.c @@ -257,12 +257,6 @@ 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) |