From 08a072c70998f89aef8f9704a16b52998a0a4d69 Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@suse.com>
Date: Mon, 14 Nov 2016 16:43:15 +0100
Subject: [PATCH] btrfs-progs: ioctl: fix compilation if ioctl.h is included
 standalone

Definition of NULL is missing if ioctl.h is included standalone or when
no other include pulls the definition.

Reported-by: Sergei Trofimovich <slyich@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 ioctl.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/ioctl.h b/ioctl.h
index cdfb8882..709e996f 100644
--- a/ioctl.h
+++ b/ioctl.h
@@ -25,6 +25,7 @@ extern "C" {
 
 #include <asm/types.h>
 #include <linux/ioctl.h>
+#include <stddef.h>
 
 #ifndef __user
 #define __user