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drivers/md/raid5: Use irqsave variant of atomic_dec_and_lock()

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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>
This commit is contained in:
Anna-Maria Gleixner 2018-07-03 22:01:36 +02:00 committed by Shaohua Li
parent ebc7709f65
commit 685dbcaa25
1 changed files with 2 additions and 3 deletions
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5
drivers/md/raid5.c
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@ -409,16 +409,15 @@ void raid5_release_stripe(struct stripe_head *sh)
md_wakeup_thread(conf->mddev->thread); md_wakeup_thread(conf->mddev->thread);
return; return;
slow_path: slow_path:
local_irq_save(flags);
/* we are ok here if STRIPE_ON_RELEASE_LIST is set or not */ /* 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); INIT_LIST_HEAD(&list);
hash = sh->hash_lock_index; hash = sh->hash_lock_index;
do_release_stripe(conf, sh, &list); do_release_stripe(conf, sh, &list);
spin_unlock(&conf->device_lock); spin_unlock(&conf->device_lock);
release_inactive_stripe_list(conf, &list, hash); release_inactive_stripe_list(conf, &list, hash);
}
local_irq_restore(flags); local_irq_restore(flags);
}
} }
static inline void remove_hash(struct stripe_head *sh) static inline void remove_hash(struct stripe_head *sh)