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#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.

 */

#define MAX_ERRNO       4095

#ifndef __ASSEMBLY__

#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)

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 IS_ERR_VALUE((unsigned long)ptr);

}

#endif

#endif /* _LINUX_ERR_H */