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- Make sure __down_read_common() is always inlined so that the callers'

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names land in traceevents output instead and thus the blocked function
   can be identified
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Merge tag 'locking_urgent_for_v6.4_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking fix from Borislav Petkov:

 - Make sure __down_read_common() is always inlined so that the callers'
   names land in traceevents output and thus the blocked function can be
   identified

* tag 'locking_urgent_for_v6.4_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/rwsem: Add __always_inline annotation to __down_read_common() and inlined callers
This commit is contained in:
Linus Torvalds 2023-05-14 08:00:46 -07:00
commit 31f4104e39
1 changed files with 4 additions and 4 deletions
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8
kernel/locking/rwsem.c
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@ -1240,7 +1240,7 @@ static struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem)
/*
* lock for reading
*/
static inline int __down_read_common(struct rw_semaphore *sem, int state)
static __always_inline int __down_read_common(struct rw_semaphore *sem, int state)
{
int ret = 0;
long count;
@ -1258,17 +1258,17 @@ out:
return ret;
}
static inline void __down_read(struct rw_semaphore *sem)
static __always_inline void __down_read(struct rw_semaphore *sem)
{
__down_read_common(sem, TASK_UNINTERRUPTIBLE);
}
static inline int __down_read_interruptible(struct rw_semaphore *sem)
static __always_inline int __down_read_interruptible(struct rw_semaphore *sem)
{
return __down_read_common(sem, TASK_INTERRUPTIBLE);
}
static inline int __down_read_killable(struct rw_semaphore *sem)
static __always_inline int __down_read_killable(struct rw_semaphore *sem)
{
return __down_read_common(sem, TASK_KILLABLE);
}