home *** CD-ROM | disk | FTP | other *** search
- #ifndef _LINUX_ERR_H
- #define _LINUX_ERR_H
-
- #include <linux/compiler.h>
-
- #include <asm/errno.h>
-
- /*
- * Kernel pointers have redundant information, so we can use a
- * scheme where we can return either an error code or a dentry
- * pointer with the same return value.
- *
- * This should be a per-architecture thing, to allow different
- * error and pointer decisions.
- */
- static inline void *ERR_PTR(long error)
- {
- return (void *) error;
- }
-
- static inline long PTR_ERR(const void *ptr)
- {
- return (long) ptr;
- }
-
- static inline long IS_ERR(const void *ptr)
- {
- return unlikely((unsigned long)ptr > (unsigned long)-1000L);
- }
-
- #endif /* _LINUX_ERR_H */
-