io_uring: kill extra check in fixed io_file_get()

ctx->nr_user_files == 0 IFF ctx->file_data == NULL and there fixed files
are not used. Hence, verifying fds only against ctx->nr_user_files is
enough. Remove the other check from hot path.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 3a65bcb..39c37ce 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5987,8 +5987,7 @@ static int io_file_get(struct io_submit_state *state, struct io_kiocb *req,
        struct file *file;
 
        if (fixed) {
-               if (unlikely(!ctx->file_data ||
-                   (unsigned) fd >= ctx->nr_user_files))
+               if (unlikely((unsigned int)fd >= ctx->nr_user_files))
                        return -EBADF;
                fd = array_index_nospec(fd, ctx->nr_user_files);
                file = io_file_from_index(ctx, fd);