From: Will Deacon <will.deacon@arm.com>
Date: Fri, 20 Jan 2012 11:01:13 +0000 (+0100)
Subject: ARM: 7294/1: vectors: use gate_vma for vectors user mapping
X-Git-Tag: v3.4-rc1~36^2~1^3~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f9d4861fc32b995b1616775614459b8f266c803c;p=pandora-kernel.git

ARM: 7294/1: vectors: use gate_vma for vectors user mapping

The current user mapping for the vectors page is inserted as a `horrible
hack vma' into each task via arch_setup_additional_pages. This causes
problems with the MM subsystem and vm_normal_page, as described here:

https://lkml.org/lkml/2012/1/14/55

Following the suggestion from Hugh in the above thread, this patch uses
the gate_vma for the vectors user mapping, therefore consolidating
the horrible hack VMAs into one.

Acked-and-Tested-by: Nicolas Pitre <nico@linaro.org>

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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