common: Always include errno.h in common.h
We want people using errnos for errors instead of -1, so make it easy
by always including the definition of all the errnos.
Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/include/common.h b/include/common.h
index f9f4605..3feaae6 100644
--- a/include/common.h
+++ b/include/common.h
@@ -16,6 +16,7 @@
typedef volatile unsigned char vu_char;
#include <config.h>
+#include <errno.h>
#include <asm-offsets.h>
#include <linux/bitops.h>
#include <linux/types.h>