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authorAnna-Maria Gleixner <anna-maria@linutronix.de>2018-07-03 23:01:36 +0300
committerShaohua Li <shli@fb.com>2018-07-19 05:45:02 +0300
commit685dbcaa25becfba864b72ec3f03470833b7f692 (patch)
tree01eaac015d0ef34db834a8f31c61ecdad65712a2 /drivers/md/raid5.c
parentebc7709f65001911f275e13dd5f29b02803c0688 (diff)
downloadlinux-685dbcaa25becfba864b72ec3f03470833b7f692.tar.xz
drivers/md/raid5: Use irqsave variant of atomic_dec_and_lock()
The irqsave variant of atomic_dec_and_lock handles irqsave/restore when taking/releasing the spin lock. With this variant the call of local_irq_save is no longer required. Cc: Shaohua Li <shli@kernel.org> Cc: linux-raid@vger.kernel.org Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid5.c')
-rw-r--r--drivers/md/raid5.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 2031506a0ecd..e933bff9459e 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -409,16 +409,15 @@ void raid5_release_stripe(struct stripe_head *sh)
md_wakeup_thread(conf->mddev->thread);
return;
slow_path:
- local_irq_save(flags);
/* we are ok here if STRIPE_ON_RELEASE_LIST is set or not */
- if (atomic_dec_and_lock(&sh->count, &conf->device_lock)) {
+ if (atomic_dec_and_lock_irqsave(&sh->count, &conf->device_lock, flags)) {
INIT_LIST_HEAD(&list);
hash = sh->hash_lock_index;
do_release_stripe(conf, sh, &list);
spin_unlock(&conf->device_lock);
release_inactive_stripe_list(conf, &list, hash);
+ local_irq_restore(flags);
}
- local_irq_restore(flags);
}
static inline void remove_hash(struct stripe_head *sh)