switch the protection of percpu_counter list to spinlock
authorAl Viro <viro@zeniv.linux.org.uk>
Tue, 31 Jul 2012 05:28:31 +0000 (09:28 +0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Tue, 31 Jul 2012 05:28:31 +0000 (09:28 +0400)
... making percpu_counter_destroy() non-blocking

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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