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Date:	Fri, 3 Sep 2010 13:04:43 -0700
From:	Dan Magenheimer <>
Subject: [PATCH V5 7/8] Cleancache: ext4 hook for cleancache

[PATCH V5 7/8] Cleancache: ext4 hook for cleancache

Filesystems must explicitly enable cleancache by calling
cleancache_init_fs anytime a instance of the filesystem
is mounted and must save the returned poolid.  For ext4,
all other cleancache hooks are in the VFS layer including
the matching cleancache_flush_fs hook which must be
called on unmount.

Signed-off-by: Dan Magenheimer <>
Acked-by: Andreas Dilger <>

 super.c                                  |    2 ++
 1 file changed, 2 insertions(+)

--- linux-2.6.36-rc3/fs/ext4/super.c	2010-08-29 09:36:04.000000000 -0600
+++ linux-2.6.36-rc3-cleancache/fs/ext4/super.c	2010-08-31 10:27:04.000000000 -0600
@@ -39,6 +39,7 @@
 #include <linux/ctype.h>
 #include <linux/log2.h>
 #include <linux/crc16.h>
+#include <linux/cleancache.h>
 #include <asm/uaccess.h>
 #include "ext4.h"
@@ -1849,6 +1850,7 @@ static int ext4_setup_super(struct super
+	cleancache_init_fs(sb);
 	return res;
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