io_uring: partially inline io_iopoll_getevents()

io_iopoll_reap_events() doesn't care about returned valued of
io_iopoll_getevents() and does the same checks for list emptiness
and need_resched(). Just use io_do_iopoll().

io_sq_thread() doesn't check return value as well. It also passes min=0,
so there never be the second iteration inside io_poll_getevents().
Inline it there too.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

fs/io_uring.c

@@ -2064,7 +2064,7 @@ static void io_iopoll_reap_events(struct io_ring_ctx *ctx)
 	while (!list_empty(&ctx->poll_list)) {
 		unsigned int nr_events = 0;
 
-		io_iopoll_getevents(ctx, &nr_events, 1);
+		io_do_iopoll(ctx, &nr_events, 1);
 
 		/*
 		 * Ensure we allow local-to-the-cpu processing to take place,
@@ -6318,8 +6318,8 @@ static int io_sq_thread(void *data)
 			unsigned nr_events = 0;
 
 			mutex_lock(&ctx->uring_lock);
-			if (!list_empty(&ctx->poll_list))
-				io_iopoll_getevents(ctx, &nr_events, 0);
+			if (!list_empty(&ctx->poll_list) && !need_resched())
+				io_do_iopoll(ctx, &nr_events, 0);
 			else
 				timeout = jiffies + ctx->sq_thread_idle;
 			mutex_unlock(&ctx->uring_lock);