From: Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 22 Mar 2010 19:22:31 +0000 (-0400)
Subject: Saner locking around deactivate_super()
X-Git-Tag: v2.6.35-rc1~432^2~59
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1712ac8fda7d8bc4dc921f5777b7423aacad7263;p=pandora-kernel.git

Saner locking around deactivate_super()

Make sure that s_umount is acquired *before* we drop the final
active reference; we still have the fast path (atomic_dec_unless)
and we have gotten rid of the window between the moment when
s_active hits zero and s_umount is acquired.  Which simplifies
the living hell out of grab_super() and inotify pin_to_kill()
stuff.

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