6 #include <linux/compiler.h>
8 #include <linux/mtd/compat.h>
11 #include <asm/errno.h>
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.
19 * This should be a per-architecture thing, to allow different
20 * error and pointer decisions.
22 #define MAX_ERRNO 4095
26 #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
28 static inline void *ERR_PTR(long error)
30 return (void *) error;
33 static inline long PTR_ERR(const void *ptr)
38 static inline long IS_ERR(const void *ptr)
40 return IS_ERR_VALUE((unsigned long)ptr);
45 #endif /* _LINUX_ERR_H */