linux-kernel - [PATCH 3/5] inotify: use container

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Message-ID: <20090809215947.26204.41124.stgit@paris.rdu.redhat.com>
Date:	Sun, 09 Aug 2009 17:59:47 -0400
From:	Eric Paris <eparis@...hat.com>
To:	linux-kernel@...r.kernel.org, viro@...IV.linux.org.uk
Subject: [PATCH 3/5] inotify: use container_of instead of casting

inotify_free_mark casts directly from an fsnotify_mark_entry to an
inotify_inode_mark_entry.  This works, but should use container_of instead
for future proofing.

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

 fs/notify/inotify/inotify_user.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index c3086b0..fb38e73 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -424,7 +424,9 @@ skip_send_ignore:
 /* ding dong the mark is dead */
 static void inotify_free_mark(struct fsnotify_mark_entry *entry)
 {
-	struct inotify_inode_mark_entry *ientry = (struct inotify_inode_mark_entry *)entry;
+	struct inotify_inode_mark_entry *ientry;
+
+	ientry = container_of(entry, struct inotify_inode_mark_entry, fsn_entry);
 
 	kmem_cache_free(inotify_inode_mark_cachep, ientry);
 }

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