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-rw-r--r--fs/sysfs/dir.c32
1 files changed, 4 insertions, 28 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index 1c3dc5d01ccd..36b6c796d4d5 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -289,22 +289,7 @@ static void sysfs_d_iput(struct dentry * dentry, struct inode * inode)
{
struct sysfs_dirent * sd = dentry->d_fsdata;
- if (sd) {
- /* sd->s_dentry is protected with sysfs_assoc_lock.
- * This allows sysfs_drop_dentry() to dereference it.
- */
- spin_lock(&sysfs_assoc_lock);
-
- /* The dentry might have been deleted or another
- * lookup could have happened updating sd->s_dentry to
- * point the new dentry. Ignore if it isn't pointing
- * to this dentry.
- */
- if (sd->s_dentry == dentry)
- sd->s_dentry = NULL;
- spin_unlock(&sysfs_assoc_lock);
- sysfs_put(sd);
- }
+ sysfs_put(sd);
iput(inode);
}
@@ -352,9 +337,6 @@ struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
* @sd: target sysfs_dirent
* @dentry: dentry to associate
*
- * Associate @sd with @dentry. This is protected by
- * sysfs_assoc_lock to avoid race with sysfs_d_iput().
- *
* LOCKING:
* mutex_lock(sysfs_mutex)
*/
@@ -362,12 +344,6 @@ static void sysfs_attach_dentry(struct sysfs_dirent *sd, struct dentry *dentry)
{
dentry->d_op = &sysfs_dentry_ops;
dentry->d_fsdata = sysfs_get(sd);
-
- /* protect sd->s_dentry against sysfs_d_iput */
- spin_lock(&sysfs_assoc_lock);
- sd->s_dentry = dentry;
- spin_unlock(&sysfs_assoc_lock);
-
d_rehash(dentry);
}
@@ -846,7 +822,7 @@ int sysfs_rename_dir(struct kobject * kobj, const char *new_name)
/* rename */
d_add(new_dentry, NULL);
- d_move(sd->s_dentry, new_dentry);
+ d_move(old_dentry, new_dentry);
error = 0;
goto out_unlock;
@@ -881,7 +857,7 @@ int sysfs_move_dir(struct kobject *kobj, struct kobject *new_parent_kobj)
error = PTR_ERR(old_dentry);
goto out_dput;
}
- old_parent = sd->s_parent->s_dentry;
+ old_parent = old_dentry->d_parent;
new_parent = sysfs_get_dentry(new_parent_sd);
if (IS_ERR(new_parent)) {
@@ -907,7 +883,7 @@ again:
} else
error = 0;
d_add(new_dentry, NULL);
- d_move(sd->s_dentry, new_dentry);
+ d_move(old_dentry, new_dentry);
dput(new_dentry);
/* Remove from old parent's list and insert into new parent's list. */