tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
18static inline int IS_ERR_OR_NULL(const void *ptr)
19{
20 return !ptr || IS_ERR_VALUE((unsigned long)ptr);
21}
22
23static inline long PTR_ERR(const void *ptr)
24{
25 return (long) ptr;
26}
27
28#endif /* __ERR_H__ */