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
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