[PATCH v6 00/11] mmc: use nonblock mmc requests to minimize latency

[Russell King - ARM Linux]

On Mon, Jun 27, 2011 at 01:34:48PM +0300, saeed bishara wrote:
> Russell,
>   I'm curious about the correctness of this patch for systems with
> outer cache. shouldn't the dsb be issued before the outer cache
> maintenance?

Maybe we should do two passes over SG lists then - one for the inner and
another for the outer cache?

In effect we could do three passes:

1. Calculate the total size of the SG list to determine whether full
   cache flush is more efficient.
2. Flush inner cache
   Then dsb()
3. Flush outer cache
   Another dsb()