From: Nick Bowler <nbowler@elliptictech.com>
Date: Wed, 24 Aug 2011 17:55:37 +0000 (+0100)
Subject: ARM: 7064/1: vexpress: Use wfi macro in platform_do_lowpower.
X-Git-Tag: v3.2-rc1~189^2^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b3377d1865723cea5334954e6ffcb2182b6689c8;p=pandora-kernel.git

ARM: 7064/1: vexpress: Use wfi macro in platform_do_lowpower.

Current Versatile Express CPU hotplug code includes a hardcoded WFI
instruction, in ARM encoding.  When the kernel is compiled in Thumb-2
mode, this is invalid and causes the machine to hang hard when a CPU
is offlined.

Using the wfi macro (which uses the appropriate assembler mnemonic)
causes the correct instruction to be emitted in either case.  As a
consequence of this change, an apparently vestigial "cc" clobber is
dropped from the asm (the macro uses "memory" only).

Signed-off-by: Nick Bowler <nbowler@elliptictech.com>
Reviewed-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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