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Lines 299-304
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* with an explicit memory barrier or atomic instruction that provides the |
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* with an explicit memory barrier or atomic instruction that provides the |
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* required ordering. |
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* required ordering. |
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*/ |
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*/ |
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#ifndef __cplusplus |
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#define __READ_ONCE(x, check) \ |
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#define __READ_ONCE(x, check) \ |
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({ \ |
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({ \ |
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Lines 309-314
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__read_once_size_nocheck(&(x), __u.__c, sizeof(x)); \ |
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__read_once_size_nocheck(&(x), __u.__c, sizeof(x)); \ |
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__u.__val; \ |
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__u.__val; \ |
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}) |
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}) |
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#else |
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#define __READ_ONCE(x, check) \ |
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({ \ |
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union { typeof(x) __val; char __c[1]={0}; } __u; \ |
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if (check) \ |
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__read_once_size(&(x), __u.__c, sizeof(x)); \ |
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else \ |
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__read_once_size_nocheck(&(x), __u.__c, sizeof(x)); \ |
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__u.__val; \ |
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}) |
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#endif |
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#define READ_ONCE(x) __READ_ONCE(x, 1) |
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#define READ_ONCE(x) __READ_ONCE(x, 1) |
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/* |
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/* |
