From 098faf5805c80f951ce5e8b4a6842382ad793c38 Mon Sep 17 00:00:00 2001
From: Shaohua Li <shli@fusionio.com>
Date: Thu, 24 Oct 2013 09:06:45 +0100
Subject: [PATCH] percpu_counter: make APIs irq safe

In my usage, sometimes the percpu APIs are called with irq locked,
sometimes not. lockdep complains there is potential deadlock. Let's
always use percpucounter lock in irq safe way. There should be no
performance penality, as all those are slow code path.

Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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