From: Anna-Maria Gleixner <[email protected]> The irqsave variant of refcount_dec_and_lock handles irqsave/restore when taking/releasing the spin lock. With this variant the call of local_irq_save/restore is no longer required.
Signed-off-by: Anna-Maria Gleixner <[email protected]> [bigeasy: s@atomic_dec_and_lock@refcount_dec_and_lock@g ] Signed-off-by: Sebastian Andrzej Siewior <[email protected]> --- mm/backing-dev.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 7984a872073e..520aa092f7b2 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -485,11 +485,8 @@ void wb_congested_put(struct bdi_writeback_congested *congested) { unsigned long flags; - local_irq_save(flags); - if (!refcount_dec_and_lock(&congested->refcnt, &cgwb_lock)) { - local_irq_restore(flags); + if (!refcount_dec_and_lock_irqsave(&congested->refcnt, &cgwb_lock, &flags)) return; - } /* bdi might already have been destroyed leaving @congested unlinked */ if (congested->__bdi) { -- 2.17.0
