kernel: use LIST_DEFINE and list_drain

kernel-src/fs/abc.c

@@ -164,8 +164,7 @@ static void writer_thread(void) {
 			__assert(written == block_count * abc->block_size);
 		}
 
-		list_node_t *list_node;
-		while ((list_node = list_pop_front(&internal_list)) != NULL) {
+		list_drain_front (&internal_list, list_node) {
 			abc_block_t *blk = (abc_block_t *)list_node;
 			if (__atomic_and_fetch(&blk->flags, ~ABC_BLOCK_FLAGS_BUSY, __ATOMIC_ACQUIRE) & ABC_BLOCK_FLAGS_DIRTY) {
 				pushlock_acquire_exclusive(&abc->dirty_list_lock);

kernel-src/fs/vfs.c

@@ -59,8 +59,7 @@ void vfs_root_event_signal(void) {
 	root_mounted = true;
 	MUTEX_RELEASE(&root_event_mutex);
 
-	list_node_t *node;
-	while ((node = list_pop_front(&root_event_list)) != NULL) {
+	list_drain_front (&root_event_list, node) {
 		root_event_waiter_t *rew = (root_event_waiter_t *)node;
 		rew->fn(rew->ctx);
 		free(rew);

kernel-src/io/net/raw.c

@@ -11,7 +11,7 @@
 #define SOCKET_BUFFER (16 * 1024)
 
 SPINLOCK_DEFINE(list_lock);
-static list_node_t socket_list = LIST_INIT_VALUE(socket_list);
+static LIST_DEFINE(socket_list);
 
 typedef struct {
 	uint8_t sender[6];