From: Thomas Gleixner <[tglx@linutronix.de]>
Date: Sat, 31 Jul 2010 15:36:06 +0000 (+0530)
Subject: arm: Disable outer (L2) cache in kexec
X-Git-Tag: v2.6.37-rc1~23^2^2~1^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ae360a78f41164e7f9c4cf846696b5b6d8dae5c8;p=pandora-kernel.git

arm: Disable outer (L2) cache in kexec

kexec does not disable the outer cache before disabling the inner
caches in cpu_proc_fin(). So L2 is enabled across the kexec jump. When
the new kernel enables chaches again, it randomly crashes.

Disabling L2 before calling cpu_proc_fin() cures the problem.

Disabling L2 requires the following new functions: flush_all(),
inv_all() and disable(). Add them to outer_cache_fns and call them
from the kexec code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
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