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 #define __STR(x) #x 9 10 #define set_if_not_errno_or_zero(x, y) \ 11 ({ \ 12 asm volatile ("if %0 s< -4095 goto +1\n" \ 13 "if %0 s<= 0 goto +1\n" \ 14 "%0 = " __STR(y) "\n" \ 15 : "+r"(x)); \ 16 }) 17 18 static inline int IS_ERR_OR_NULL(const void *ptr) 19 { 20 return !ptr || IS_ERR_VALUE((unsigned long)ptr); 21 } 22 23 static inline long PTR_ERR(const void *ptr) 24 { 25 return (long) ptr; 26 } 27 28 #endif /* __ERR_H__ */ 29