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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef _LINUX_ERR_H |
| 2 | #define _LINUX_ERR_H |
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| 3 | |||
| 4 | #include <asm/errno.h> |
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| 5 | |||
| 6 | /* |
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| 7 | * Kernel pointers have redundant information, so we can use a |
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| 8 | * scheme where we can return either an error code or a dentry |
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| 9 | * pointer with the same return value. |
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| 10 | * |
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| 11 | * This should be a per-architecture thing, to allow different |
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| 12 | * error and pointer decisions. |
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| 13 | */ |
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| 14 | static inline void *ERR_PTR(long error) |
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| 15 | { |
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| 16 | return (void *) error; |
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| 17 | } |
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| 18 | |||
| 19 | static inline long PTR_ERR(const void *ptr) |
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| 20 | { |
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| 21 | return (long) ptr; |
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| 22 | } |
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| 23 | |||
| 24 | static inline long IS_ERR(const void *ptr) |
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| 25 | { |
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| 26 | return (unsigned long)ptr > (unsigned long)-1000L; |
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| 27 | } |
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| 28 | |||
| 29 | #endif /* _LINUX_ERR_H */ |