From: Miklos Szeredi <mszeredi@suse.cz>
Date: Thu, 23 Oct 2014 22:14:37 +0000 (+0200)
Subject: shmem: support RENAME_WHITEOUT
X-Git-Tag: fixes-against-v3.18-rc2~5^2~4^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=46fdb794e3f52ef18b859ebc92f0a9d7db21c5df;p=pandora-kernel.git

shmem: support RENAME_WHITEOUT

Allocate a dentry, initialize it with a whiteout and hash it in the place
of the old dentry.  Later the old dentry will be moved away and the
whiteout will remain.

i_mutex protects agains concurrent readdir.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
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