[PATCH] VFS: Permit filesystem to override root dentry on mount

[mirror_ubuntu-bionic-kernel.git] / fs / namespace.c

diff --git a/fs/namespace.c b/fs/namespace.c
index bf478addb852b70c1ec036e33100f93031c5dc6b..c13072a5f1ee8bd1a57c9186de12a5a55c553d1b 100644 (file)
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -86,6 +86,15 @@ struct vfsmount *alloc_vfsmnt(const char *name)
        return mnt;
 }
 
+int simple_set_mnt(struct vfsmount *mnt, struct super_block *sb)
+{
+       mnt->mnt_sb = sb;
+       mnt->mnt_root = dget(sb->s_root);
+       return 0;
+}
+
+EXPORT_SYMBOL(simple_set_mnt);
+
 void free_vfsmnt(struct vfsmount *mnt)
 {
        kfree(mnt->mnt_devname);