diff options
Diffstat (limited to 'debian/patches-rt/locking-Remove-rt_rwlock_is_contended.patch')
| -rw-r--r-- | debian/patches-rt/locking-Remove-rt_rwlock_is_contended.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/debian/patches-rt/locking-Remove-rt_rwlock_is_contended.patch b/debian/patches-rt/locking-Remove-rt_rwlock_is_contended.patch new file mode 100644 index 000000000..43b227a54 --- /dev/null +++ b/debian/patches-rt/locking-Remove-rt_rwlock_is_contended.patch @@ -0,0 +1,34 @@ +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Tue, 7 Sep 2021 12:11:47 +0200 +Subject: [PATCH] locking: Remove rt_rwlock_is_contended() +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.15/older/patches-5.15.3-rt21.tar.xz + +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> +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 +@@ -257,12 +257,6 @@ 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) |