]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _LINUX_ERR_H |
2 | #define _LINUX_ERR_H | |
3 | ||
4 | #include <linux/compiler.h> | |
5 | ||
6 | #include <asm/errno.h> | |
7 | ||
8 | /* | |
9 | * Kernel pointers have redundant information, so we can use a | |
10 | * scheme where we can return either an error code or a dentry | |
11 | * pointer with the same return value. | |
12 | * | |
13 | * This should be a per-architecture thing, to allow different | |
14 | * error and pointer decisions. | |
15 | */ | |
07ab67c8 LT |
16 | #define IS_ERR_VALUE(x) unlikely((x) > (unsigned long)-1000L) |
17 | ||
1da177e4 LT |
18 | static inline void *ERR_PTR(long error) |
19 | { | |
20 | return (void *) error; | |
21 | } | |
22 | ||
23 | static inline long PTR_ERR(const void *ptr) | |
24 | { | |
25 | return (long) ptr; | |
26 | } | |
27 | ||
28 | static inline long IS_ERR(const void *ptr) | |
29 | { | |
07ab67c8 | 30 | return IS_ERR_VALUE((unsigned long)ptr); |
1da177e4 LT |
31 | } |
32 | ||
33 | #endif /* _LINUX_ERR_H */ |