From: Steve Capper <steve.capper@arm.com>
Date: Fri, 8 Feb 2013 15:01:19 +0000 (+0200)
Subject: ARM: mm: Add support for flushing HugeTLB pages.
X-Git-Tag: sz_154~147
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f0e152d4b904a9c2dc68628de5c6ede3c570c45b;p=pandora-kernel.git

ARM: mm: Add support for flushing HugeTLB pages.

On ARM we use the __flush_dcache_page function to flush the dcache
of pages when needed; usually when the PG_dcache_clean bit is unset
and we are setting a PTE.

A HugeTLB page is represented as a compound page consisting of an
array of pages. Thus to flush the dcache of a HugeTLB page, one must
flush more than a single page.

This patch modifies __flush_dcache_page such that all constituent
pages of a HugeTLB page are flushed.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Steve Capper <steve.capper@arm.com>
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