io_uring: clean *local_work_add var naming

if (!first) { ... }

While it reads as do something if it's not the first entry, it does
exactly the opposite because "first" here is a pointer to the first
entry. Remove the confusion by renaming it into "head".

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/3b8be483b52f58a524185bb88694b8a268e7e85d.1705438669.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 3ab7e6a46149b140faf68c4057ec1282cad1b16f..3508198d17ba9ad6331add405c7de6f1b43fc6f1 100644 (file)
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -1304,16 +1304,16 @@ static inline void io_req_local_work_add(struct io_kiocb *req, unsigned flags)
 {
        struct io_ring_ctx *ctx = req->ctx;
        unsigned nr_wait, nr_tw, nr_tw_prev;
-       struct llist_node *first;
+       struct llist_node *head;
 
        if (req->flags & (REQ_F_LINK | REQ_F_HARDLINK))
                flags &= ~IOU_F_TWQ_LAZY_WAKE;
 
-       first = READ_ONCE(ctx->work_llist.first);
+       head = READ_ONCE(ctx->work_llist.first);
        do {
                nr_tw_prev = 0;
-               if (first) {
-                       struct io_kiocb *first_req = container_of(first,
+               if (head) {
+                       struct io_kiocb *first_req = container_of(head,
                                                        struct io_kiocb,
                                                        io_task_work.node);
                        /*
@@ -1328,8 +1328,8 @@ static inline void io_req_local_work_add(struct io_kiocb *req, unsigned flags)
                        nr_tw = INT_MAX;
 
                req->nr_tw = nr_tw;
-               req->io_task_work.node.next = first;
-       } while (!try_cmpxchg(&ctx->work_llist.first, &first,
+               req->io_task_work.node.next = head;
+       } while (!try_cmpxchg(&ctx->work_llist.first, &head,
                              &req->io_task_work.node));
 
        /*
@@ -1340,7 +1340,7 @@ static inline void io_req_local_work_add(struct io_kiocb *req, unsigned flags)
         * is similar to the wait/wawke task state sync.
         */
 
-       if (!first) {
+       if (!head) {
                if (ctx->flags & IORING_SETUP_TASKRUN_FLAG)
                        atomic_or(IORING_SQ_TASKRUN, &ctx->rings->sq_flags);
                if (ctx->has_evfd)