datapath: Add backport for __always_unused.

Reported-by: Ben Pfaff <bpfaff@vmware.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>

diff --git a/datapath/linux/compat/include/linux/compiler-gcc.h b/datapath/linux/compat/include/linux/compiler-gcc.h
index 1ee8d6f..bf057f7 100644 (file)
--- a/datapath/linux/compat/include/linux/compiler-gcc.h
+++ b/datapath/linux/compat/include/linux/compiler-gcc.h
@@ -7,3 +7,7 @@
 #ifndef __packed
 #define __packed __attribute__((packed))
 #endif
+
+#ifndef __always_unused
+#define __always_unused __attribute__((unused))
+#endif