From: Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 20 Jun 2011 14:52:57 +0000 (-0400)
Subject: lockless get_write_access/deny_write_access
X-Git-Tag: v3.1-rc1~282^2~98
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=07b8ce1ee87d291ff564c02cf878fae973317a52;p=pandora-kernel.git

lockless get_write_access/deny_write_access

new helpers: atomic_inc_unless_negative()/atomic_dec_unless_positive()

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