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lockless get_write_access/deny_write_access
authorAl Viro <viro@zeniv.linux.org.uk>
Mon, 20 Jun 2011 14:52:57 +0000 (10:52 -0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Wed, 20 Jul 2011 05:43:14 +0000 (01:43 -0400)
new helpers: atomic_inc_unless_negative()/atomic_dec_unless_positive()

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

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