From 27d55f1f4c190b14092fcca3069c7d15df83514f Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 16 Jan 2010 13:07:36 -0500
Subject: [PATCH] do_add_mount() should sanitize mnt_flags

MNT_WRITE_HOLD shouldn't leak into new vfsmount and neither
should MNT_SHARED (the latter will be set properly, along with
the rest of shared-subtree data structures)

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