29 lines
592 B
C
29 lines
592 B
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ERR_H__
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#define __ERR_H__
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#define MAX_ERRNO 4095
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#define IS_ERR_VALUE(x) (unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO
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#define __STR(x) #x
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#define set_if_not_errno_or_zero(x, y) \
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({ \
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asm volatile ("if %0 s< -4095 goto +1\n" \
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"if %0 s<= 0 goto +1\n" \
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"%0 = " __STR(y) "\n" \
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: "+r"(x)); \
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})
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static inline int IS_ERR_OR_NULL(const void *ptr)
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{
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return !ptr || IS_ERR_VALUE((unsigned long)ptr);
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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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#endif /* __ERR_H__ */
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