diff options
| author | Thomas Gleixner <[email protected]> | 2022-08-25 18:41:25 +0200 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2022-09-19 14:35:07 +0200 |
| commit | 93f6d4e1893657f07ba3c9e2bfa74b355a0b32f9 (patch) | |
| tree | 506ce516c4283c31d73ce3bfe4c649a14660c7e0 | |
| parent | 555bb4ccd1dd78d0263eae31629fe1fdd65c1fb5 (diff) | |
dentry: Use preempt_[dis|en]able_nested()
Replace the open coded CONFIG_PREEMPT_RT conditional
preempt_disable/enable() with the new helper.
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Acked-by: Christian Brauner (Microsoft) <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
| -rw-r--r-- | fs/dcache.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index bb0c4d0038db..2ee8636016ee 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -2597,15 +2597,7 @@ EXPORT_SYMBOL(d_rehash); static inline unsigned start_dir_add(struct inode *dir) { - /* - * The caller holds a spinlock (dentry::d_lock). On !PREEMPT_RT - * kernels spin_lock() implicitly disables preemption, but not on - * PREEMPT_RT. So for RT it has to be done explicitly to protect - * the sequence count write side critical section against a reader - * or another writer preempting, which would result in a live lock. - */ - if (IS_ENABLED(CONFIG_PREEMPT_RT)) - preempt_disable(); + preempt_disable_nested(); for (;;) { unsigned n = dir->i_dir_seq; if (!(n & 1) && cmpxchg(&dir->i_dir_seq, n, n + 1) == n) @@ -2618,8 +2610,7 @@ static inline void end_dir_add(struct inode *dir, unsigned int n, wait_queue_head_t *d_wait) { smp_store_release(&dir->i_dir_seq, n + 2); - if (IS_ENABLED(CONFIG_PREEMPT_RT)) - preempt_enable(); + preempt_enable_nested(); wake_up_all(d_wait); } |