1 #ifndef ERR_H
2 #define ERR_H
3 #define MAX_ERRNO 4095
4
5 #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
6
7 static inline void * __must_check ERR_PTR(long error)
8 {
9 return (void *) error;
10 }
11
12 static inline long __must_check PTR_ERR(const void *ptr)
13 {
14 return (long) ptr;
15 }
16
17 static inline long __must_check IS_ERR(const void *ptr)
18 {
19 return IS_ERR_VALUE((unsigned long)ptr);
20 }
21
22 static inline long __must_check IS_ERR_OR_NULL(const void *ptr)
23 {
24 return !ptr || IS_ERR_VALUE((unsigned long)ptr);
25 }
26 #endif /* ERR_H */
27
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