Re: [PATCH 1/2] BKL: Remove BKL from default_llseek()

Alan Cox
2009-11-18T18:14:49Z

O> But nowadays, even that doesn't happen. sys_read() and sys_write()
> make a copy of f_pos using file_pos_read(), so drivers cannot see the
> value change during the call - except for their own change.
>
> I find myself wondering why the VFS isn't responsible for the position
> update instead of the driver... Would it be a valid cleanup to move
> it from the driver to VFS?

And how would you adjust it. Not all devices have a bytes read == offset
relationship. The VFS doesn't know enough.