D54663.diff
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	diff --git a/sys/compat/freebsd32/freebsd32.h b/sys/compat/freebsd32/freebsd32.h
	--- a/sys/compat/freebsd32/freebsd32.h
	+++ b/sys/compat/freebsd32/freebsd32.h
	@@ -36,8 +36,17 @@
	#include <sys/_ffcounter.h>

	/*
	- * i386 is the only arch with a 32-bit time_t
	+ * i386 is the only arch with a 32-bit time_t.
	+ * Also it is the only arch with (u)int64_t having 4-bytes alignment.
	*/
	+typedef struct {
	+#ifdef __amd64__
	+ uint32_t val[2];
	+#else
	+ uint64_t val;
	+#endif
	+} freebsd32_uint64_t;
	+
	#ifdef __amd64__
	typedef int32_t time32_t;
	#else
	@@ -61,7 +70,7 @@

	struct bintime32 {
	time32_t sec;
	- uint32_t frac[2];
	+ freebsd32_uint64_t frac;
	};

	struct ffclock_estimate32 {
	diff --git a/sys/sys/abi_compat.h b/sys/sys/abi_compat.h
	--- a/sys/sys/abi_compat.h
	+++ b/sys/sys/abi_compat.h
	@@ -67,9 +67,17 @@
	TS_CP((src), (dst), it_value); \
	} while (0)

	+#define FU64_CP(src, dst, fld) do { \
	+ _Static_assert(sizeof((src).fld) == sizeof(uint64_t), \
	+ "FU64_CP src: " #src "." #fld "is not 8 bytes"); \
	+ _Static_assert(sizeof((dst).fld) == sizeof(uint64_t), \
	+ "FU64_CP dst: " #dst "." #fld "is not 8 bytes"); \
	+ memcpy(&(dst).fld, &(src).fld, sizeof(uint64_t)); \
	+} while (0)
	+
	#define BT_CP(src, dst, fld) do { \
	CP((src).fld, (dst).fld, sec); \
	- (uint64_t )&(dst).fld.frac[0] = (src).fld.frac; \
	+ FU64_CP((src).fld, (dst).fld, frac); \
	} while (0)

	#endif /* !_COMPAT_H_ */