diff --git a/fs/fs_context.c b/fs/fs_context.c
index 87c2c9687d90..138b5b4d621d 100644
--- a/fs/fs_context.c
+++ b/fs/fs_context.c
@@ -504,7 +504,6 @@ void put_fs_context(struct fs_context *fc)
 	put_net(fc->net_ns);
 	put_user_ns(fc->user_ns);
 	put_cred(fc->cred);
-	kfree(fc->subtype);
 	put_fc_log(fc);
 	put_filesystem(fc->fs_type);
 	kfree(fc->source);
@@ -571,17 +570,6 @@ static int legacy_parse_param(struct fs_context *fc, struct fs_parameter *param)
 		return 0;
 	}
 
-	if ((fc->fs_type->fs_flags & FS_HAS_SUBTYPE) &&
-	    strcmp(param->key, "subtype") == 0) {
-		if (param->type != fs_value_is_string)
-			return invalf(fc, "VFS: Legacy: Non-string subtype");
-		if (fc->subtype)
-			return invalf(fc, "VFS: Legacy: Multiple subtype");
-		fc->subtype = param->string;
-		param->string = NULL;
-		return 0;
-	}
-
 	if (ctx->param_type == LEGACY_FS_MONOLITHIC_PARAMS)
 		return invalf(fc, "VFS: Legacy: Can't mix monolithic and individual options");
 
@@ -738,8 +726,6 @@ void vfs_clean_context(struct fs_context *fc)
 	fc->s_fs_info = NULL;
 	fc->sb_flags = 0;
 	security_free_mnt_opts(&fc->security);
-	kfree(fc->subtype);
-	fc->subtype = NULL;
 	kfree(fc->source);
 	fc->source = NULL;
 
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index c334f95e799a..2183967261a4 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -473,8 +473,7 @@ static const struct fs_parameter_spec fuse_param_specs[] = {
 	fsparam_flag	("allow_other",		OPT_ALLOW_OTHER),
 	fsparam_u32	("max_read",		OPT_MAX_READ),
 	fsparam_u32	("blksize",		OPT_BLKSIZE),
-	__fsparam(fs_param_is_string, "subtype", OPT_SUBTYPE,
-		  fs_param_v_optional),
+	fsparam_string	("subtype",		OPT_SUBTYPE),
 	{}
 };
 
diff --git a/fs/namespace.c b/fs/namespace.c
index d28d30b13043..105f995543f6 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2768,8 +2768,6 @@ static int do_new_mount(struct path *path, const char *fstype, int sb_flags,
 				put_filesystem(type);
 				return -EINVAL;
 			}
-		} else {
-			subtype = "";
 		}
 	}
 
diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c
index e16fb8f2049e..273ee82d8aa9 100644
--- a/fs/proc_namespace.c
+++ b/fs/proc_namespace.c
@@ -88,7 +88,7 @@ static inline void mangle(struct seq_file *m, const char *s)
 static void show_type(struct seq_file *m, struct super_block *sb)
 {
 	mangle(m, sb->s_type->name);
-	if (sb->s_subtype && sb->s_subtype[0]) {
+	if (sb->s_subtype) {
 		seq_putc(m, '.');
 		mangle(m, sb->s_subtype);
 	}
diff --git a/fs/super.c b/fs/super.c
index da223b4cfbca..a6ceed7bcd89 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1530,11 +1530,6 @@ int vfs_get_tree(struct fs_context *fc)
 	sb = fc->root->d_sb;
 	WARN_ON(!sb->s_bdi);
 
-	if (fc->subtype && !sb->s_subtype) {
-		sb->s_subtype = fc->subtype;
-		fc->subtype = NULL;
-	}
-
 	/*
 	 * Write barrier is for super_cache_count(). We place it before setting
 	 * SB_BORN as the data dependency between the two functions is the
diff --git a/include/linux/fs_context.h b/include/linux/fs_context.h
index 84a5eaa09f19..f6c86d58ea91 100644
--- a/include/linux/fs_context.h
+++ b/include/linux/fs_context.h
@@ -95,7 +95,6 @@ struct fs_context {
 	const struct cred	*cred;		/* The mounter's credentials */
 	struct fc_log		*log;		/* Logging buffer */
 	const char		*source;	/* The source name (eg. dev path) */
-	const char		*subtype;	/* The subtype to set on the superblock */
 	void			*security;	/* Linux S&M options */
 	void			*s_fs_info;	/* Proposed s_fs_info */
 	unsigned int		sb_flags;	/* Proposed superblock flags (SB_*) */