9ns: Add high-level support for symlinks

[akaros.git] / kern / include / error.h

diff --git a/kern/include/error.h b/kern/include/error.h
index b2d09e1..e5ba6e5 100644 (file)
--- a/kern/include/error.h
+++ b/kern/include/error.h
@@ -5,21 +5,10 @@
 #include <ros/errno.h>
 
 typedef int error_t;
-extern const char *const errno_strings[];
-extern const int MAX_ERRNO;
 
-#define ERR_PTR(err)  ((void *)((uintptr_t)(err)))
-#define PTR_ERR(ptr)  ((uintptr_t)(ptr))
-#define IS_ERR(ptr)   ((uintptr_t)-(uintptr_t)(ptr) <= MAX_ERRNO)
+#define MAX_ERRNO              4095
 
-/* Plan9 wants to return non-const char* all over the place, so even if a const
- * char* would have made much more sense, unless we want to refactor a huge
- * amount of code, we need to return a char*.
- */
-static inline char *errno_to_string(int error)
-{
-       extern const char *const errno_strings[];
-
-       return error >= 0 && error < MAX_ERRNO && errno_strings[error] != NULL ?
-               (char *) errno_strings[error]: (char *) "Unknown error";
-}
+#define ERR_PTR(err)  ((void *)((intptr_t)(err)))
+#define PTR_ERR(ptr)  ((intptr_t)(ptr))
+#define IS_ERR(ptr)   (-(intptr_t)(ptr) <= MAX_ERRNO)
+#define IS_ERR_OR_NULL(ptr) (!(ptr) || IS_ERR(ptr))