ia64/xen-unstable

view extras/mini-os/include/err.h @ 10843:4f6d858ea570

[PCI] Per-device permissive flag (replaces global permissive flag).
Signed-off-by: Chris Bookholt <hap10@tycho.ncsc.mil>
author kfraser@localhost.localdomain
date Fri Jul 28 12:56:10 2006 +0100 (2006-07-28)
parents 06d84bf87159
children 707e10c9a487
line source
1 #ifndef _ERR_H
2 #define _ERR_H
4 #include <errno.h>
6 /*
7 * Kernel pointers have redundant information, so we can use a
8 * scheme where we can return either an error code or a dentry
9 * pointer with the same return value.
10 *
11 * This should be a per-architecture thing, to allow different
12 * error and pointer decisions.
13 */
14 #define IS_ERR_VALUE(x) ((x) > (unsigned long)-1000L)
16 static inline void *ERR_PTR(long error)
17 {
18 return (void *) error;
19 }
21 static inline long PTR_ERR(const void *ptr)
22 {
23 return (long) ptr;
24 }
26 static inline long IS_ERR(const void *ptr)
27 {
28 return IS_ERR_VALUE((unsigned long)ptr);
29 }
31 #endif /* _LINUX_ERR_H */