From e2af99fc1620434f6bb6bea7024d59ddeb66995e Mon Sep 17 00:00:00 2001
From: Dan Walsh <dwalsh@redhat.com>
Date: Tue, 22 Dec 2015 13:59:28 -0500
Subject: [PATCH] No options to tmpfs is valid

If you run a

docker run command with --tmpfs /mountpoint:noexec

Or certain options that get translated into mount options, the mount command can get passed "" for mount data.
So this should be valid.

Signed-off-by: Dan Walsh <dwalsh@redhat.com>
---
 mount/flags.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mount/flags.go b/mount/flags.go
index 4305d15..d2fb1fb 100644
--- a/mount/flags.go
+++ b/mount/flags.go
@@ -73,6 +73,7 @@ func parseOptions(options string) (int, string) {
 func ParseTmpfsOptions(options string) (int, string, error) {
 	flags, data := parseOptions(options)
 	validFlags := map[string]bool{
+		"":          true,
 		"size":      true,
 		"mode":      true,
 		"uid":       true,