Re: [PATCH 03/15] osst: Update ppos instead of using file->f_pos

[Jamie Lokier]

Jamie Lokier wrote:
> Jan Blunck wrote:
> > osst_read()/osst_write() modify file->f_pos directly instead of the ppos
> > given to them. The VFS later updates the file->f_pos and overwrites it
> > with the value of ppos.
> 
> I notice st.c doesn't use or update file->f_pos (or *ppos), so
> userspace probably won't be caring about f_pos from osst.c (they're
> both SCSI tape drivers).  And osst.c doesn't use the value, it just
> increases it with each transfer.  It doesn't even reset the value to
> zero when rewinding the tape, so it's not that meaningful.
> 
> So how about just removing those modifications to file->f_pos from osst.c?

Or alternatively, perhaps they are missing from st.c.  I don't know,
but userspace can't have been all that dependent on the value :-)

-- Jamie
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/