diff options
| author | Anna-Maria Gleixner <anna-maria@linutronix.de> | 2018-08-22 06:55:35 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-22 19:52:46 +0200 |
| commit | 060288a7320b2837a8ff2af1b3643bdbd5e568f6 (patch) | |
| tree | 3d936151c374ab20a12fe0268bf9c6a815da09a4 | |
| parent | bdi: use refcount_t for reference counting instead atomic_t (diff) | |
| download | linux-060288a7320b2837a8ff2af1b3643bdbd5e568f6.tar.xz linux-060288a7320b2837a8ff2af1b3643bdbd5e568f6.zip | |
bdi: use irqsave variant of refcount_dec_and_lock()
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.
[bigeasy@linutronix.de: s@atomic_dec_and_lock@refcount_dec_and_lock@g]
Link: http://lkml.kernel.org/r/20180703200141.28415-5-bigeasy@linutronix.de
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/backing-dev.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 55a233d75f39..f5981e9d6ae2 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -473,11 +473,8 @@ 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) { |