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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/tools/perf/util/memswap.h
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@@ -2,6 +2,13 @@
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 #ifndef PERF_MEMSWAP_H_
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 #define PERF_MEMSWAP_H_
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+#include <linux/types.h>
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+
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+union u64_swap {
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+	u64 val64;
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+	u32 val32[2];
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+};
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+
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 void mem_bswap_64(void *src, int byte_size);
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 void mem_bswap_32(void *src, int byte_size);
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