err.h

 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
 8static inline void * __must_check ERR_PTR(long error)
 9{
10	return (void *) error;
11}
12
13static inline long __must_check PTR_ERR(const void *ptr)
14{
15	return (long) ptr;
16}
17
18static inline long __must_check IS_ERR(const void *ptr)
19{
20	return IS_ERR_VALUE((unsigned long)ptr);
21}
22
23static 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 */