--- a/sys/dev/rt/if_rt.c
+++ b/sys/dev/rt/if_rt.c
@@ -286,7 +286,7 @@ generate_mac(uint8_t *mac)
 static int
 ether_request_mac(device_t dev, uint8_t *mac)
 {
-	char *var;
+	const char *var;
 
 	/*
 	 * "ethaddr" is passed via envp on RedBoot platforms
--- a/sys/mips/mediatek/mtk_clock.c
+++ b/sys/mips/mediatek/mtk_clock.c
@@ -123,6 +123,8 @@ mtk_clock_get_info(device_t dev, int index, struct fdt_clock_info *info)
 	if (index < 0 || index > 31 || info == NULL)
 		return (EINVAL);
 
+	mask = (1u << index);
+
 	if (mtk_sysctl_get(SYSCTL_CLKCFG1) & mask)
 		info->flags = FDT_CIFLAG_RUNNING;
 	else
--- a/sys/mips/mediatek/mtk_soc.c
+++ b/sys/mips/mediatek/mtk_soc.c
@@ -35,6 +35,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/rman.h>
 
 #include <machine/fdt.h>
+#include <machine/md_var.h>
 
 #include <dev/ofw/openfirm.h>
 #include <dev/ofw/ofw_bus.h>