diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c
index b15a6c1c3..4fdbc9fbb 100644
--- a/src/server/gdb_server.c
+++ b/src/server/gdb_server.c
@@ -2977,7 +2977,8 @@ static int gdb_query_packet(struct connection *connection,
 	return ERROR_OK;
 }
 
-static bool gdb_handle_vcont_packet(struct connection *connection, const char *packet, int packet_size)
+static bool gdb_handle_vcont_packet(struct connection *connection, const char *packet,
+	__attribute__((unused)) int packet_size)
 {
 	struct gdb_connection *gdb_connection = connection->priv;
 	struct target *target = get_target_from_connection(connection);
@@ -2996,7 +2997,6 @@ static bool gdb_handle_vcont_packet(struct connection *connection, const char *p
 
 	if (parse[0] == ';') {
 		++parse;
-		--packet_size;
 	}
 
 	/* simple case, a continue packet */
@@ -3035,14 +3035,11 @@ static bool gdb_handle_vcont_packet(struct connection *connection, const char *p
 		int current_pc = 1;
 		int64_t thread_id;
 		parse++;
-		packet_size--;
 		if (parse[0] == ':') {
 			char *endp;
 			parse++;
-			packet_size--;
 			thread_id = strtoll(parse, &endp, 16);
 			if (endp) {
-				packet_size -= endp - parse;
 				parse = endp;
 			}
 		} else {
@@ -3065,7 +3062,6 @@ static bool gdb_handle_vcont_packet(struct connection *connection, const char *p
 
 		if (parse[0] == ';') {
 			++parse;
-			--packet_size;
 
 			if (parse[0] == 'c') {
 				parse += 1;
diff --git a/src/target/arm7_9_common.c b/src/target/arm7_9_common.c
index 8f87d9cda..0632290d9 100644
--- a/src/target/arm7_9_common.c
+++ b/src/target/arm7_9_common.c
@@ -1553,7 +1553,6 @@ static int arm7_9_restore_context(struct target *target)
 
 		if (dirty) {
 			uint32_t mask = 0x0;
-			int num_regs = 0;
 			uint32_t regs[16];
 
 			if (mode_change) {
@@ -1576,7 +1575,6 @@ static int arm7_9_restore_context(struct target *target)
 				if (reg->dirty) {
 					regs[j] = buf_get_u32(reg->value, 0, 32);
 					mask |= 1 << j;
-					num_regs++;
 					reg->dirty = false;
 					reg->valid = true;
 					LOG_DEBUG("writing register %i mode %s "
diff --git a/src/target/riscv/riscv.c b/src/target/riscv/riscv.c
index 8dafa02b4..865abd080 100644
--- a/src/target/riscv/riscv.c
+++ b/src/target/riscv/riscv.c
@@ -2187,7 +2187,6 @@ int riscv_openocd_poll(struct target *target)
 	int halted_hart = -1;
 
 	if (target->smp) {
-		unsigned halts_discovered = 0;
 		unsigned should_remain_halted = 0;
 		unsigned should_resume = 0;
 		struct target_list *list;
@@ -2203,7 +2202,6 @@ int riscv_openocd_poll(struct target *target)
 				t->debug_reason = DBG_REASON_NOTHALTED;
 				break;
 			case RPH_DISCOVERED_HALTED:
-				halts_discovered++;
 				t->state = TARGET_HALTED;
 				enum riscv_halt_reason halt_reason =
 					riscv_halt_reason(t, r->current_hartid);
diff --git a/src/target/target.c b/src/target/target.c
index 6c0f4afb1..c55b67cc9 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -1940,13 +1940,13 @@ static int target_call_timer_callbacks_check_time(int checktime)
 	return ERROR_OK;
 }
 
-int target_call_timer_callbacks()
+int target_call_timer_callbacks(void)
 {
 	return target_call_timer_callbacks_check_time(1);
 }
 
 /* invoke periodic callbacks immediately */
-int target_call_timer_callbacks_now()
+int target_call_timer_callbacks_now(void)
 {
 	return target_call_timer_callbacks_check_time(0);
 }