D20218.diff
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	Index: head/sys/dev/random/ivy.c
	===================================================================
	--- head/sys/dev/random/ivy.c
	+++ head/sys/dev/random/ivy.c
	@@ -97,6 +97,13 @@
	return (retry);
	}

	+static int
	+x86_unimpl_store(u_long *buf __unused)
	+{
	+
	+ panic("%s called", __func__);
	+}
	+
	DEFINE_IFUNC(static, int, x86_rng_store, (u_long *buf), static)
	{
	has_rdrand = (cpu_feature2 & CPUID2_RDRAND);
	@@ -107,7 +114,7 @@
	else if (has_rdrand)
	return (x86_rdrand_store);
	else
	- return (NULL);
	+ return (x86_unimpl_store);
	}

	/* It is required that buf length is a multiple of sizeof(u_long). */