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422 giacomo 1
#ifndef _LINUX_ERR_H
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#define _LINUX_ERR_H
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#include <asm/errno.h>
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/*
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 * Kernel pointers have redundant information, so we can use a
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 * scheme where we can return either an error code or a dentry
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 * pointer with the same return value.
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 *
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 * This should be a per-architecture thing, to allow different
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 * error and pointer decisions.
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 */
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static inline void *ERR_PTR(long error)
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{
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        return (void *) error;
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}
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static inline long PTR_ERR(const void *ptr)
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{
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        return (long) ptr;
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}
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static inline long IS_ERR(const void *ptr)
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{
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        return (unsigned long)ptr > (unsigned long)-1000L;
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}
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#endif /* _LINUX_ERR_H */