From f743a7adbd6e230d66a6206fa115b59fec2d88eb Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 22 Nov 2023 01:07:42 +0000
Subject: [PATCH] disable pwm7
---
kernel/include/linux/percpu-rwsem.h | 24 ++++--------------------
1 files changed, 4 insertions(+), 20 deletions(-)
diff --git a/kernel/include/linux/percpu-rwsem.h b/kernel/include/linux/percpu-rwsem.h
index 79b99d6..fb44e23 100644
--- a/kernel/include/linux/percpu-rwsem.h
+++ b/kernel/include/linux/percpu-rwsem.h
@@ -29,7 +29,7 @@
extern int __percpu_down_read(struct percpu_rw_semaphore *, int);
extern void __percpu_up_read(struct percpu_rw_semaphore *);
-static inline void percpu_down_read_preempt_disable(struct percpu_rw_semaphore *sem)
+static inline void percpu_down_read(struct percpu_rw_semaphore *sem)
{
might_sleep();
@@ -47,16 +47,10 @@
__this_cpu_inc(*sem->read_count);
if (unlikely(!rcu_sync_is_idle(&sem->rss)))
__percpu_down_read(sem, false); /* Unconditional memory barrier */
- barrier();
/*
- * The barrier() prevents the compiler from
+ * The preempt_enable() prevents the compiler from
* bleeding the critical section out.
*/
-}
-
-static inline void percpu_down_read(struct percpu_rw_semaphore *sem)
-{
- percpu_down_read_preempt_disable(sem);
preempt_enable();
}
@@ -83,13 +77,9 @@
return ret;
}
-static inline void percpu_up_read_preempt_enable(struct percpu_rw_semaphore *sem)
+static inline void percpu_up_read(struct percpu_rw_semaphore *sem)
{
- /*
- * The barrier() prevents the compiler from
- * bleeding the critical section out.
- */
- barrier();
+ preempt_disable();
/*
* Same as in percpu_down_read().
*/
@@ -100,12 +90,6 @@
preempt_enable();
rwsem_release(&sem->rw_sem.dep_map, 1, _RET_IP_);
-}
-
-static inline void percpu_up_read(struct percpu_rw_semaphore *sem)
-{
- preempt_disable();
- percpu_up_read_preempt_enable(sem);
}
extern void percpu_down_write(struct percpu_rw_semaphore *);
--
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