digest.h: needs errno definitions

digest_set_key() returns -ENOTSUPP conditionally, so include errno.h.

Fixes: 2f3c3f512b ("digest: add HMAC support for md5, sha1, sha224, sha256, sha384, sha512")
Signed-off-by: Juergen Borleis <jbe@pengutronix.de>
Signed-off-by: Bastian Krause <bst@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/digest.h b/include/digest.h
index 474bdd160a..176084146b 100644
--- a/include/digest.h
+++ b/include/digest.h
@@ -20,6 +20,7 @@
 #define __DIGEST_H__
 
 #include <linux/list.h>
+#include <errno.h>
 
 struct digest;