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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>
This commit is contained in:
Miklos Szeredi 2008-06-16 13:46:47 +02:00 committed by Greg Kroah-Hartman
parent 838ea8e8db
commit 93265d13ea
1 changed files with 4 additions and 1 deletions
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5
fs/sysfs/file.c
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@ -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);