From 6bd57f2e5db408e0dfdb3bf052d58c4e7b18ed3c Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Date: Wed, 10 Jun 2009 04:39:07 +0000
Subject: [PATCH] ps3flash: Cache the last accessed FLASH chunk

Add support for caching, to reduce FLASH wear when writing using small
blocksizes. As we also don't care anymore about heads and tails in case of
partial writes, this greatly simplifies the code for handling writes.

Note: We don't bother caching reads smaller than the FLASH chunk size
(256 KiB).

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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