From e528fa197258081d02b187b4b3b61894dc5d2e48 Mon Sep 17 00:00:00 2001
From: Ming-Hung Tsai <mingnus@gmail.com>
Date: Fri, 27 Nov 2015 23:38:42 +0800
Subject: [PATCH] Add BLKDISCARD definition

---
 thin-provisioning/thin_trim.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/thin-provisioning/thin_trim.cc b/thin-provisioning/thin_trim.cc
index 0118b62..38a95f2 100644
--- a/thin-provisioning/thin_trim.cc
+++ b/thin-provisioning/thin_trim.cc
@@ -6,6 +6,10 @@
 
 #undef BLOCK_SIZE
 
+#ifndef BLKDISCARD
+#define BLKDISCARD _IO(0x12,119)
+#endif
+
 #include "thin-provisioning/commands.h"
 #include "metadata.h"
 #include "version.h"