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io_uring: kill io_llist_xchg

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io_llist_xchg is only used to set the list to NULL, which can also be
done with llist_del_all(). Use the latter and kill io_llist_xchg.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d6765112680d2e86a58b76166b7513391ff4e5d7.1729264960.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2024-10-18 17:07:31 +01:00 committed by Jens Axboe
parent b6b3eb19dd
commit 1e6e7602cc
1 changed files with 1 additions and 15 deletions
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16
io_uring/io_uring.c
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@ -1081,20 +1081,6 @@ struct llist_node *io_handle_tw_list(struct llist_node *node,
return node;
}
/**
* io_llist_xchg - swap all entries in a lock-less list
* @head: the head of lock-less list to delete all entries
* @new: new entry as the head of the list
*
* If list is empty, return NULL, otherwise, return the pointer to the first entry.
* The order of entries returned is from the newest to the oldest added one.
*/
static inline struct llist_node *io_llist_xchg(struct llist_head *head,
struct llist_node *new)
{
return xchg(&head->first, new);
}
static __cold void io_fallback_tw(struct io_uring_task *tctx, bool sync)
{
struct llist_node *node = llist_del_all(&tctx->task_list);
@ -1316,7 +1302,7 @@ again:
* llists are in reverse order, flip it back the right way before
* running the pending items.
*/
node = llist_reverse_order(io_llist_xchg(&ctx->work_llist, NULL));
node = llist_reverse_order(llist_del_all(&ctx->work_llist));
while (node) {
struct llist_node *next = node->next;
struct io_kiocb *req = container_of(node, struct io_kiocb,