1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ERR_H__ 3 #define __ERR_H__ 4 5 #define MAX_ERRNO 4095 6 #define IS_ERR_VALUE(x) (unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO 7 8 static inline int IS_ERR_OR_NULL(const void *ptr) 9 { 10 return !ptr || IS_ERR_VALUE((unsigned long)ptr); 11 } 12 13 static inline long PTR_ERR(const void *ptr) 14 { 15 return (long) ptr; 16 } 17 18 #endif /* __ERR_H__ */ 19