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	diff --git a/sys/arm64/arm64/trap.c b/sys/arm64/arm64/trap.c
	index 9f792332a931..6292522ae67b 100644
	--- a/sys/arm64/arm64/trap.c
	+++ b/sys/arm64/arm64/trap.c
	@@ -214,0 +215,11 @@ align_abort(struct thread td, struct trapframe frame, uint64_t esr,
	+ /*
	+ * Accessing unaligned memory may fault when using atomics.
	+ * Make sure we don't panic if we're doing an unaligned
	+ * access to userland memory, as can happen with _umtx_op()
	+ */
	+ if (td->td_intr_nesting_level == 0 &&
	+ td->td_pcb->pcb_onfault != 0) {
	+ frame->tf_elr = td->td_pcb->pcb_onfault;
	+ return;
	+ }
	+