Commit 41fe75f6 authored by majianpeng's avatar majianpeng Committed by NeilBrown

md/raid5: use atomic_dec_return() instead of atomic_dec() and atomic_read().

Signed-off-by: default avatarmajianpeng <majianpeng@gmail.com>
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent 43437ecd
...@@ -208,11 +208,10 @@ static void __release_stripe(struct r5conf *conf, struct stripe_head *sh) ...@@ -208,11 +208,10 @@ static void __release_stripe(struct r5conf *conf, struct stripe_head *sh)
md_wakeup_thread(conf->mddev->thread); md_wakeup_thread(conf->mddev->thread);
} else { } else {
BUG_ON(stripe_operations_active(sh)); BUG_ON(stripe_operations_active(sh));
if (test_and_clear_bit(STRIPE_PREREAD_ACTIVE, &sh->state)) { if (test_and_clear_bit(STRIPE_PREREAD_ACTIVE, &sh->state))
atomic_dec(&conf->preread_active_stripes); if (atomic_dec_return(&conf->preread_active_stripes)
if (atomic_read(&conf->preread_active_stripes) < IO_THRESHOLD) < IO_THRESHOLD)
md_wakeup_thread(conf->mddev->thread); md_wakeup_thread(conf->mddev->thread);
}
atomic_dec(&conf->active_stripes); atomic_dec(&conf->active_stripes);
if (!test_bit(STRIPE_EXPANDING, &sh->state)) { if (!test_bit(STRIPE_EXPANDING, &sh->state)) {
list_add_tail(&sh->lru, &conf->inactive_list); list_add_tail(&sh->lru, &conf->inactive_list);
......
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