D57992.diff
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	diff --git a/sys/arm64/arm64/mte.c b/sys/arm64/arm64/mte.c
	--- a/sys/arm64/arm64/mte.c
	+++ b/sys/arm64/arm64/mte.c
	@@ -38,7 +38,7 @@
	#include <vm/vm_page.h>

	/* Version of MTE implemented. 0 == unimplemented */
	-static u_int __read_mostly mte_version = 0;
	+static int __read_mostly mte_version = 0;

	/*
	* FEAT_MTE (mte_version == 1) has userspace instructions, but no tag
	@@ -49,6 +49,13 @@

	struct thread mte_switch(struct thread );

	+bool
	+mte_enabled(void)
	+{
	+ MPASS(mte_version >= 0);
	+ return (MTE_HAS_TAG_CHECK);
	+}
	+
	#define load_tags(addr) ({ \
	uint64_t __val; \
	asm volatile( \
	diff --git a/sys/arm64/include/cpu.h b/sys/arm64/include/cpu.h
	--- a/sys/arm64/include/cpu.h
	+++ b/sys/arm64/include/cpu.h
	@@ -278,6 +278,7 @@
	#endif

	/* Memory Tagging Extension (MTE) support */
	+bool mte_enabled(void);
	void mte_fork(struct thread , struct thread );
	void mte_exec(struct thread *);
	void mte_copy_thread(struct thread , struct thread );