From: Andy Zhou <azhou@nicira.com>
Date: Tue, 27 Aug 2013 23:19:53 +0000 (-0700)
Subject: datapath: add rounddown() definition into compatibility code
X-Git-Tag: sliver-openvswitch-2.0.90-1~18^2~8
X-Git-Url: http://git.onelab.eu/?p=sliver-openvswitch.git;a=commitdiff_plain;h=7061a497b10b0c830cebcd463ceac053ba81dea5

datapath: add rounddown() definition into compatibility code

rounddown() was not available in older kenrel, such as kernel 2.6.32.61.
Add it to the compatibility code.

Signed-off-by: Andy Zhou <azhou@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
---

diff --git a/datapath/linux/compat/include/linux/kernel.h b/datapath/linux/compat/include/linux/kernel.h
index fdd20058c..6e248c572 100644
--- a/datapath/linux/compat/include/linux/kernel.h
+++ b/datapath/linux/compat/include/linux/kernel.h
@@ -87,4 +87,13 @@
 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
 #endif
 
+#ifndef rounddown
+#define rounddown(x, y) (				\
+{							\
+	typeof(x) __x = (x);				\
+	__x - (__x % (y));				\
+}							\
+)
+#endif
+
 #endif /* linux/kernel.h */