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-rw-r--r--include/linux/percpu-rwsem.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h
index 18f35b54286c..250a4acddb2b 100644
--- a/include/linux/percpu-rwsem.h
+++ b/include/linux/percpu-rwsem.h
@@ -17,16 +17,16 @@ struct percpu_rw_semaphore {
static inline void percpu_down_read(struct percpu_rw_semaphore *p)
{
- rcu_read_lock();
+ rcu_read_lock_sched();
if (unlikely(p->locked)) {
- rcu_read_unlock();
+ rcu_read_unlock_sched();
mutex_lock(&p->mtx);
this_cpu_inc(*p->counters);
mutex_unlock(&p->mtx);
return;
}
this_cpu_inc(*p->counters);
- rcu_read_unlock();
+ rcu_read_unlock_sched();
light_mb(); /* A, between read of p->locked and read of data, paired with D */
}
@@ -51,7 +51,7 @@ static inline void percpu_down_write(struct percpu_rw_semaphore *p)
{
mutex_lock(&p->mtx);
p->locked = true;
- synchronize_rcu();
+ synchronize_sched(); /* make sure that all readers exit the rcu_read_lock_sched region */
while (__percpu_count(p->counters))
msleep(1);
heavy_mb(); /* C, between read of p->counter and write to data, paired with B */