[PATCH 07/11] fsmc/nand: Provide contiguous buffers to dma

Artem Bityutskiy dedekind1 at gmail.com
Tue Oct 16 03:14:45 EDT 2012

On Mon, 2012-10-15 at 21:51 +0200, Linus Walleij wrote:
> On Mon, Oct 15, 2012 at 6:27 PM, Brian Norris
> <computersforpeace at gmail.com> wrote:
> > I would prefer not building a solution that hopes kmalloc() can get a
> > large contiguous buffer (remember, eraseblock sizes come as large as
> > 2MB these days). A real solution like CMA or scatter-gather seems like
> > a better idea.
> +1 on that, and as I think I illustrated the MMC subsystem is using
> the block layer helpers to form scatter-gather lists for it's requests.
> I don't see why the MTD subsystem need to be very different?

This is good idea, the problem is that it is a bit more work than
hacking the driver, so most people prefer the latter. By removing all
kmalloc()'s I basically wish to force people to go this way.

What are the SC functions names you refer?

Best Regards,
Artem Bityutskiy
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