From: Anna-Maria Gleixner <anna-maria@xxxxxxxxxxxxx>
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/restore is no longer required.
Signed-off-by: Anna-Maria Gleixner <anna-maria@xxxxxxxxxxxxx>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
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 023190c69dce..c28418914591 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -484,11 +484,8 @@ void wb_congested_put(struct bdi_writeback_congested *congested)
{
unsigned long flags;
- local_irq_save(flags);
- if (!atomic_dec_and_lock(&congested->refcnt, &cgwb_lock)) {
- local_irq_restore(flags);
+ if (!atomic_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
