[patch 06/15] sysfs: dont call notify_change

[Miklos Szeredi]

From: Miklos Szeredi <mszeredi@xxxxxxx>

sysfs_chmod_file() calls notify_change() to change the permission bits
on a sysfs file.  Replace with explicit call to sysfs_setattr() and
fsnotify_change().

This is equivalent, except that security_inode_setattr() is not
called.  This function is called by drivers, so the security checks do
not make any sense.

Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxx>
CC: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
 fs/sysfs/file.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Index: linux-2.6/fs/sysfs/file.c
===================================================================
--- linux-2.6.orig/fs/sysfs/file.c	2008-05-05 11:29:21.000000000 +0200
+++ linux-2.6/fs/sysfs/file.c	2008-05-05 11:29:26.000000000 +0200
@@ -18,6 +18,7 @@
 #include <linux/poll.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
+#include <linux/fsnotify.h>
 #include <asm/uaccess.h>
 
 #include "sysfs.h"
@@ -585,9 +586,11 @@ int sysfs_chmod_file(struct kobject *kob
 
 	newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
 	newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
-	rc = notify_change(victim, &newattrs);
+	newattrs.ia_ctime = current_fs_time(inode->i_sb);
+	rc = sysfs_setattr(victim, &newattrs);
 
 	if (rc == 0) {
+		fsnotify_change(victim, newattrs.ia_valid);
 		mutex_lock(&sysfs_mutex);
 		victim_sd->s_mode = newattrs.ia_mode;
 		mutex_unlock(&sysfs_mutex);

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