sysfs: don't call notify_change

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@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index e7735f643cd1b03eab8560479d6f691e387ce218..3f07893ff8968a483f4c5fc45646c80e3535966f 100644 (file)
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -14,6 +14,7 @@
 #include <linux/kobject.h>
 #include <linux/kallsyms.h>
 #include <linux/slab.h>
+#include <linux/fsnotify.h>
 #include <linux/namei.h>
 #include <linux/poll.h>
 #include <linux/list.h>
@@ -585,9 +586,11 @@ int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
 
        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);