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