io_uring/rsrc: rename rsrc_list

We have too many "rsrc" around which makes the name of struct
io_rsrc_node::rsrc_list confusing. The field is responsible for keeping
a list of files or buffers, so call it item_list and add comments
around.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/3e34d4dfc1fdbb6b520f904ee6187c2ccf680efe.1680576071.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/rsrc.c

@@ -146,7 +146,7 @@ static void __io_rsrc_put_work(struct io_rsrc_node *ref_node)
 	struct io_ring_ctx *ctx = rsrc_data->ctx;
 	struct io_rsrc_put *prsrc, *tmp;
 
-	list_for_each_entry_safe(prsrc, tmp, &ref_node->rsrc_list, list) {
+	list_for_each_entry_safe(prsrc, tmp, &ref_node->item_list, list) {
 		list_del(&prsrc->list);
 
 		if (prsrc->tag) {
@@ -249,7 +249,7 @@ static struct io_rsrc_node *io_rsrc_node_alloc(void)
 
 	ref_node->refs = 1;
 	INIT_LIST_HEAD(&ref_node->node);
-	INIT_LIST_HEAD(&ref_node->rsrc_list);
+	INIT_LIST_HEAD(&ref_node->item_list);
 	ref_node->done = false;
 	return ref_node;
 }
@@ -737,7 +737,7 @@ int io_queue_rsrc_removal(struct io_rsrc_data *data, unsigned idx,
 	prsrc->tag = *tag_slot;
 	*tag_slot = 0;
 	prsrc->rsrc = rsrc;
-	list_add(&prsrc->list, &node->rsrc_list);
+	list_add(&prsrc->list, &node->item_list);
 	return 0;
 }
 

io_uring/rsrc.h

@@ -38,11 +38,17 @@ struct io_rsrc_data {
 
 struct io_rsrc_node {
 	struct list_head		node;
-	struct list_head		rsrc_list;
 	struct io_rsrc_data		*rsrc_data;
 	struct llist_node		llist;
 	int				refs;
 	bool				done;
+
+	/*
+	 * Keeps a list of struct io_rsrc_put to be completed. Each entry
+	 * represents one rsrc (e.g. file or buffer), but all of them should've
+	 * came from the same table and so are of the same type.
+	 */
+	struct list_head		item_list;
 };
 
 struct io_mapped_ubuf {