colibri_imx6: fix video stdout in default environment

[oweals/u-boot.git] / include / errno.h

diff --git a/include/errno.h b/include/errno.h
index e0c670a16c32c80d0dfe7e95612b70a5cb07ec05..3af539b9e91b2150c3ad659d0e8d77907f063271 100644 (file)
--- a/include/errno.h
+++ b/include/errno.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2014 Samsung Electronics
  * Przemyslaw Marczak <p.marczak@samsung.com>
- *
- * SPDX-License-Identifier:    GPL-2.0+
  */
 #ifndef _ERRNO_H
 #define _ERRNO_H
@@ -13,12 +12,21 @@ extern int errno;
 
 #define __set_errno(val) do { errno = val; } while (0)
 
+/**
+ * errno_str() - get description for error number
+ *
+ * @errno:     error number (negative in case of error)
+ * Return:     string describing the error. If CONFIG_ERRNO_STR is not
+ *             defined an empty string is returned.
+ */
 #ifdef CONFIG_ERRNO_STR
 const char *errno_str(int errno);
 #else
+static const char error_message[] = "";
+
 static inline const char *errno_str(int errno)
 {
-       return 0;
+       return error_message;
 }
 #endif
 #endif /* _ERRNO_H */