Merge tag 'video-next-20211228' of https://source.denx.de/u-boot/custodians/u-boot...

[platform/kernel/u-boot.git] / include / errno.h

diff --git a/include/errno.h b/include/errno.h
index e0c670a..652ad67 100644 (file)
--- a/include/errno.h
+++ b/include/errno.h
@@ -1,24 +1,38 @@
+/* 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
 
 #include <linux/errno.h>
 
-extern int errno;
+#ifdef __SANDBOX__
+#define __errno_asm_label asm("__u_boot_errno")
+#else
+#define __errno_asm_label
+#endif
+
+extern int errno __errno_asm_label;
 
 #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 */