xref: /OK3568_Linux_fs/kernel/tools/virtio/linux/err.h (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef ERR_H
3*4882a593Smuzhiyun #define ERR_H
4*4882a593Smuzhiyun #define MAX_ERRNO	4095
5*4882a593Smuzhiyun 
6*4882a593Smuzhiyun #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
7*4882a593Smuzhiyun 
ERR_PTR(long error)8*4882a593Smuzhiyun static inline void * __must_check ERR_PTR(long error)
9*4882a593Smuzhiyun {
10*4882a593Smuzhiyun 	return (void *) error;
11*4882a593Smuzhiyun }
12*4882a593Smuzhiyun 
PTR_ERR(const void * ptr)13*4882a593Smuzhiyun static inline long __must_check PTR_ERR(const void *ptr)
14*4882a593Smuzhiyun {
15*4882a593Smuzhiyun 	return (long) ptr;
16*4882a593Smuzhiyun }
17*4882a593Smuzhiyun 
IS_ERR(const void * ptr)18*4882a593Smuzhiyun static inline long __must_check IS_ERR(const void *ptr)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun 	return IS_ERR_VALUE((unsigned long)ptr);
21*4882a593Smuzhiyun }
22*4882a593Smuzhiyun 
IS_ERR_OR_NULL(const void * ptr)23*4882a593Smuzhiyun static inline long __must_check IS_ERR_OR_NULL(const void *ptr)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun 	return !ptr || IS_ERR_VALUE((unsigned long)ptr);
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun #endif /* ERR_H */
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