From: Mark Rutland <mark.rutland@arm.com>
Date: Thu, 18 Jul 2013 16:20:33 +0000 (+0100)
Subject: ARM: 7787/1: virt: ensure visibility of __boot_cpu_mode
X-Git-Tag: v3.11-rc4~12^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8fbac214e5c594a0c2fe78c14adf2cdbb1febc92;p=pandora-kernel.git

ARM: 7787/1: virt: ensure visibility of __boot_cpu_mode

Secondary CPUs write to __boot_cpu_mode with caches disabled, and thus a
cached value of __boot_cpu_mode may be incoherent with that in memory.
This could lead to a failure to detect mismatched boot modes.

This patch adds flushing to ensure that writes by secondaries to
__boot_cpu_mode are made visible before we test against it.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <cdall@cs.columbia.edu>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

Reading git-diff-tree failed