xref: /openbmc/u-boot/include/linux/err.h (revision e7e90901)
1 #ifndef _LINUX_ERR_H
2 #define _LINUX_ERR_H
3 
4 /* XXX U-BOOT XXX */
5 #if 0
6 #include <linux/compiler.h>
7 #else
8 #include <linux/compat.h>
9 #endif
10 
11 #include <asm/errno.h>
12 
13 
14 /*
15  * Kernel pointers have redundant information, so we can use a
16  * scheme where we can return either an error code or a dentry
17  * pointer with the same return value.
18  *
19  * This should be a per-architecture thing, to allow different
20  * error and pointer decisions.
21  */
22 #define MAX_ERRNO	4095
23 
24 #ifndef __ASSEMBLY__
25 
26 #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
27 
28 static inline void *ERR_PTR(long error)
29 {
30 	return (void *) error;
31 }
32 
33 static inline long PTR_ERR(const void *ptr)
34 {
35 	return (long) ptr;
36 }
37 
38 static inline long IS_ERR(const void *ptr)
39 {
40 	return IS_ERR_VALUE((unsigned long)ptr);
41 }
42 
43 #endif
44 
45 #endif /* _LINUX_ERR_H */
46