[RFC] unifying write variants for filesystems

[Al Viro]

On Mon, Feb 03, 2014 at 07:12:42AM -0800, Christoph Hellwig wrote:
> > we end up calling it is allowed to try and steal pages).   Possibly more
> > variants on the read side of things...  FWIW, I'm not sure that bio_vec
> > makes a lot of sense here.
> 
> bio_vec just is one of the many page+offset+len containers we have, I
> guess Dave took it because loop uses it.  We could either invent a new
> one here or finally have a common one for the different uses all over
> the kernel.

*blink*

Good luck unifying all such uses.  That would have to include the things
needed by pipe_buffer, DMA-related bits for scatterlist, etc.  I don't
believe that it's feasible, or would've been a good idea in the first
place...