io_uring/alloc_cache: get rid of _nocache() helper

Just allow passing in NULL for the cache, if the type in question
doesn't have a cache associated with it.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: axboe

io_uring/io_uring.h

@@ -228,18 +228,14 @@ static inline void io_req_set_res(struct io_kiocb *req, s32 res, u32 cflags)
 static inline void *io_uring_alloc_async_data(struct io_alloc_cache *cache,
 					      struct io_kiocb *req)
 {
-	req->async_data = io_cache_alloc(cache, GFP_KERNEL);
-	if (req->async_data)
-		req->flags |= REQ_F_ASYNC_DATA;
-	return req->async_data;
-}
+	if (cache) {
+		req->async_data = io_cache_alloc(cache, GFP_KERNEL);
+	} else {
+		const struct io_issue_def *def = &io_issue_defs[req->opcode];
 
-static inline void *io_uring_alloc_async_data_nocache(struct io_kiocb *req)
-{
-	const struct io_issue_def *def = &io_issue_defs[req->opcode];
-
-	WARN_ON_ONCE(!def->async_size);
-	req->async_data = kmalloc(def->async_size, GFP_KERNEL);
+		WARN_ON_ONCE(!def->async_size);
+		req->async_data = kmalloc(def->async_size, GFP_KERNEL);
+	}
 	if (req->async_data)
 		req->flags |= REQ_F_ASYNC_DATA;
 	return req->async_data;

io_uring/timeout.c

@@ -544,7 +544,7 @@ static int __io_timeout_prep(struct io_kiocb *req,
 
 	if (WARN_ON_ONCE(req_has_async_data(req)))
 		return -EFAULT;
-	data = io_uring_alloc_async_data_nocache(req);
+	data = io_uring_alloc_async_data(NULL, req);
 	if (!data)
 		return -ENOMEM;
 	data->req = req;

io_uring/waitid.c

@@ -303,7 +303,7 @@ int io_waitid(struct io_kiocb *req, unsigned int issue_flags)
 	struct io_waitid_async *iwa;
 	int ret;
 
-	iwa = io_uring_alloc_async_data_nocache(req);
+	iwa = io_uring_alloc_async_data(NULL, req);
 	if (!iwa)
 		return -ENOMEM;