1 files changed, 10 insertions, 21 deletions

diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index e6bb9b2a4cbe..a5cf784f9cc2 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -300,15 +300,15 @@ void release_sysfs_dirent(struct sysfs_dirent * sd)
 static int sysfs_dentry_delete(const struct dentry *dentry)
 {
         struct sysfs_dirent *sd = dentry->d_fsdata;
-        return !!(sd->s_flags & SYSFS_FLAG_REMOVED);
+        return !(sd && !(sd->s_flags & SYSFS_FLAG_REMOVED));
 }
 
-static int sysfs_dentry_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int sysfs_dentry_revalidate(struct dentry *dentry, unsigned int flags)
 {
         struct sysfs_dirent *sd;
         int is_dir;
 
-        if (nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         sd = dentry->d_fsdata;
@@ -355,18 +355,15 @@ out_bad:
         return 0;
 }
 
-static void sysfs_dentry_iput(struct dentry *dentry, struct inode *inode)
+static void sysfs_dentry_release(struct dentry *dentry)
 {
-        struct sysfs_dirent * sd = dentry->d_fsdata;
-
-        sysfs_put(sd);
-        iput(inode);
+        sysfs_put(dentry->d_fsdata);
 }
 
-static const struct dentry_operations sysfs_dentry_ops = {
+const struct dentry_operations sysfs_dentry_ops = {
         .d_revalidate   = sysfs_dentry_revalidate,
         .d_delete       = sysfs_dentry_delete,
-        .d_iput         = sysfs_dentry_iput,
+        .d_release      = sysfs_dentry_release,
 };
 
 struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
@@ -764,7 +761,7 @@ int sysfs_create_dir(struct kobject * kobj)
 }
 
 static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
-                                struct nameidata *nd)
+                                unsigned int flags)
 {
         struct dentry *ret = NULL;
         struct dentry *parent = dentry->d_parent;
@@ -786,6 +783,7 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
                 ret = ERR_PTR(-ENOENT);
                 goto out_unlock;
         }
+        dentry->d_fsdata = sysfs_get(sd);
 
         /* attach dentry and inode */
         inode = sysfs_get_inode(dir->i_sb, sd);
@@ -795,16 +793,7 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
         }
 
         /* instantiate and hash dentry */
-        ret = d_find_alias(inode);
-        if (!ret) {
-                d_set_d_op(dentry, &sysfs_dentry_ops);
-                dentry->d_fsdata = sysfs_get(sd);
-                d_add(dentry, inode);
-        } else {
-                d_move(ret, dentry);
-                iput(inode);
-        }
-
+        ret = d_materialise_unique(dentry, inode);
  out_unlock:
         mutex_unlock(&sysfs_mutex);
         return ret;