From dead537dd8a1c9495322c1d6f7c780697f474af0 Mon Sep 17 00:00:00 2001
From: Eric Paris <eparis@redhat.com>
Date: Mon, 24 Aug 2009 16:03:35 -0400
Subject: [PATCH] inotify: fix locking around inotify watching in the idr

The are races around the idr storage of inotify watches.  It's possible
that a watch could be found from sys_inotify_rm_watch() in the idr, but it
could be removed from the idr before that code does it's removal.  Move the
locking and the refcnt'ing so that these have to happen atomically.

Signed-off-by: Eric Paris <eparis@redhat.com>
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