diff --git a/usr.sbin/bhyve/basl.h b/usr.sbin/bhyve/basl.h
--- a/usr.sbin/bhyve/basl.h
+++ b/usr.sbin/bhyve/basl.h
@@ -6,7 +6,10 @@
 
 #pragma once
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-parameter"
 #include <contrib/dev/acpica/include/acpi.h>
+#pragma clang diagnostic pop
 
 #define ACPI_GAS_ACCESS_WIDTH_LEGACY 0
 #define ACPI_GAS_ACCESS_WIDTH_UNDEFINED 0
@@ -20,7 +23,7 @@
 #define BASL_TABLE_ALIGNMENT 0x10
 #define BASL_TABLE_ALIGNMENT_FACS 0x40
 
-#define BASL_TABLE_CHECKSUM_LEN_FULL_TABLE (-1)
+#define BASL_TABLE_CHECKSUM_LEN_FULL_TABLE (-1U)
 
 #define BASL_EXEC(x)                                                         \
 	do {                                                                 \
diff --git a/usr.sbin/bhyve/basl.c b/usr.sbin/bhyve/basl.c
--- a/usr.sbin/bhyve/basl.c
+++ b/usr.sbin/bhyve/basl.c
@@ -49,8 +49,7 @@
 	uint32_t len;
 	uint32_t off;
 	uint32_t alignment;
-	STAILQ_HEAD(basl_table_checksum_list,
-	    basl_table_checksum) checksums;
+	STAILQ_HEAD(basl_table_checksum_list, basl_table_checksum) checksums;
 	STAILQ_HEAD(basl_table_length_list, basl_table_length) lengths;
 	STAILQ_HEAD(basl_table_pointer_list, basl_table_pointer) pointers;
 };
@@ -110,7 +109,7 @@
 	return (0);
 }
 
-static int
+static int __unused
 basl_dump(const bool mem)
 {
 	struct basl_table *table;
@@ -279,7 +278,7 @@
 		assert(length->off < table->len);
 		assert(length->off + length->size <= table->len);
 
-		basl_le_enc(table->data + length->off, table->len,
+		basl_le_enc((uint8_t *)table->data + length->off, table->len,
 		    length->size);
 	}