From: Catalin Marinas <catalin.marinas@arm.com>
Date: Wed, 1 May 2013 11:23:05 +0000 (+0100)
Subject: arm64: Avoid cache flushing in flush_dcache_page()
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~40^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5b6c9e9149d8a7c3f1d7b9d0c046c6184e1dd17;p=pandora-kernel.git

arm64: Avoid cache flushing in flush_dcache_page()

The flush_dcache_page() function is called when the kernel modified a
page cache page. Since the D-cache on AArch64 does not have aliases
this function can simply mark the page as dirty for later flushing via
set_pte_at()/__sync_icache_dcache() if the page is executable (to ensure
the I-D cache coherency).

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Will Deacon <will.deacon@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
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