Merge tag 'tpm-fixes-for-4.2-rc2' of https://github.com/PeterHuewe/linux-tpmdd into...

[firefly-linux-kernel-4.4.55.git] / fs / sysfs / dir.c

diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index 0b45ff42f3741123a15f58d426e201a78d20b3d0..94374e43502599c466153858476bd42652a7ea1b 100644 (file)
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -121,3 +121,37 @@ int sysfs_move_dir_ns(struct kobject *kobj, struct kobject *new_parent_kobj,
 
        return kernfs_rename_ns(kn, new_parent, kn->name, new_ns);
 }
+
+/**
+ * sysfs_create_mount_point - create an always empty directory
+ * @parent_kobj:  kobject that will contain this always empty directory
+ * @name: The name of the always empty directory to add
+ */
+int sysfs_create_mount_point(struct kobject *parent_kobj, const char *name)
+{
+       struct kernfs_node *kn, *parent = parent_kobj->sd;
+
+       kn = kernfs_create_empty_dir(parent, name);
+       if (IS_ERR(kn)) {
+               if (PTR_ERR(kn) == -EEXIST)
+                       sysfs_warn_dup(parent, name);
+               return PTR_ERR(kn);
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(sysfs_create_mount_point);
+
+/**
+ *     sysfs_remove_mount_point - remove an always empty directory.
+ *     @parent_kobj: kobject that will contain this always empty directory
+ *     @name: The name of the always empty directory to remove
+ *
+ */
+void sysfs_remove_mount_point(struct kobject *parent_kobj, const char *name)
+{
+       struct kernfs_node *parent = parent_kobj->sd;
+
+       kernfs_remove_by_name_ns(parent, name, NULL);
+}
+EXPORT_SYMBOL_GPL(sysfs_remove_mount_point);