1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef ERR_H
3 #define ERR_H
4 #define MAX_ERRNO 4095
5
6 #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
7
8 static inline void * __must_check ERR_PTR(long error)
9 {
10 return (void *) error;
11 }
12
13 static inline long __must_check PTR_ERR(const void *ptr)
14 {
15 return (long) ptr;
16 }
17
18 static inline long __must_check IS_ERR(const void *ptr)
19 {
20 return IS_ERR_VALUE((unsigned long)ptr);
21 }
22
23 static inline long __must_check IS_ERR_OR_NULL(const void *ptr)
24 {
25 return !ptr || IS_ERR_VALUE((unsigned long)ptr);
26 }
27 #endif /* ERR_H */
28
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