diff --git a/sys/arm64/arm64/db_trace.c b/sys/arm64/arm64/db_trace.c
index 82b6e07fc261..4c0b7a2c2e06 100644
--- a/sys/arm64/arm64/db_trace.c
+++ b/sys/arm64/arm64/db_trace.c
@@ -1,133 +1,133 @@
 /*-
  * Copyright (c) 2015 The FreeBSD Foundation
  * All rights reserved.
  *
  * This software was developed by Semihalf under
  * the sponsorship of the FreeBSD Foundation.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #include "opt_ddb.h"
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 #include <sys/param.h>
 #include <sys/proc.h>
 #include <sys/kdb.h>
 #include <machine/pcb.h>
 #include <ddb/ddb.h>
 #include <ddb/db_sym.h>
 
 #include <machine/armreg.h>
 #include <machine/debug_monitor.h>
 #include <machine/stack.h>
 
 void
-db_md_list_watchpoints()
+db_md_list_watchpoints(void)
 {
 
 	dbg_show_watchpoint();
 }
 
 int
 db_md_clr_watchpoint(db_expr_t addr, db_expr_t size)
 {
 
 	return (dbg_remove_watchpoint(addr, size, DBG_FROM_EL1));
 }
 
 int
 db_md_set_watchpoint(db_expr_t addr, db_expr_t size)
 {
 
 	return (dbg_setup_watchpoint(addr, size, DBG_FROM_EL1,
 	    HW_BREAKPOINT_RW));
 }
 
 static void
 db_stack_trace_cmd(struct unwind_state *frame)
 {
 	c_db_sym_t sym;
 	const char *name;
 	db_expr_t value;
 	db_expr_t offset;
 
 	while (1) {
 		uint64_t pc = frame->pc;
 		int ret;
 
 		ret = unwind_frame(frame);
 		if (ret < 0)
 			break;
 
 		sym = db_search_symbol(pc, DB_STGY_ANY, &offset);
 		if (sym == C_DB_SYM_NULL) {
 			value = 0;
 			name = "(null)";
 		} else
 			db_symbol_values(sym, &name, &value);
 
 		db_printf("%s() at ", name);
 		db_printsym(frame->pc, DB_STGY_PROC);
 		db_printf("\n");
 
 		db_printf("\t pc = 0x%016lx  lr = 0x%016lx\n", pc,
 		    frame->pc);
 		db_printf("\t sp = 0x%016lx  fp = 0x%016lx\n", frame->sp,
 		    frame->fp);
 		/* TODO: Show some more registers */
 		db_printf("\n");
 	}
 }
 
 int
 db_trace_thread(struct thread *thr, int count)
 {
 	struct unwind_state frame;
 	struct pcb *ctx;
 
 	if (thr != curthread) {
 		ctx = kdb_thr_ctx(thr);
 
 		frame.sp = (uint64_t)ctx->pcb_sp;
 		frame.fp = (uint64_t)ctx->pcb_x[29];
 		frame.pc = (uintptr_t)ctx->pcb_lr;
 		db_stack_trace_cmd(&frame);
 	} else
 		db_trace_self();
 	return (0);
 }
 
 void
 db_trace_self(void)
 {
 	struct unwind_state frame;
 	uint64_t sp;
 
 	__asm __volatile("mov %0, sp" : "=&r" (sp));
 
 	frame.sp = sp;
 	frame.fp = (uint64_t)__builtin_frame_address(0);
 	frame.pc = (uint64_t)db_trace_self;
 	db_stack_trace_cmd(&frame);
 }