From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 3 Mar 2010 19:13:08 +0000 (-0500)
Subject: fix race in d_splice_alias()
X-Git-Tag: v2.6.34-rc1~205^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4919c5e45a91b5db5a41695fe0357fbdff0d5767;p=pandora-kernel.git

fix race in d_splice_alias()

rehashing the negative placeholder opens a race with d_lookup();
we unhash it almost immediately (by d_move()), but the race
window is there.  Since d_move() doesn't rely on target being
hashed, we don't need that d_rehash() at all.

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