On Wed, Mar 28, 2018 at 05:35:26PM +0100, Al Viro wrote: > > ret = vfs_fsync(req->file, req->datasync); > > - fput(req->file); > > - aio_complete(container_of(req, struct aio_kiocb, fsync), ret, 0); > > + if (aio_complete(iocb, ret, 0, 0)) > > + fput(file); > > IDGI. > 1) can aio_complete() ever return false here?
It won't. But sometimes checking the return value and sometimes not seems like a bad pattern. > 2) do we ever have aio_kiocb that would not have an associated > struct file * that needs to be dropped on successful aio_complete()? AFAICS, > rw, fsync and poll variants all have one, and I'm not sure what kind of > async IO *could* be done without an opened file. All have a file assoiated at least right now. As mentioned last time finding a struct to pass that file would be rather annoying, so we'd either have to pass it explicitly, or do something nasty like duplicating the pointer in the aio_kiocb in addition to struct kiocb. Which might not be that bad after all, as it would only bloat the aio_kiocb and not struct kiocb used on stack all over.
