From: Dave Martin <dave.martin@linaro.org>
Date: Wed, 1 Dec 2010 17:05:13 +0000 (+0100)
Subject: ARM: 6517/1: kexec: Add missing memory clobber to inline asm in crash_setup_regs()
X-Git-Tag: v2.6.38-rc1~471^2~5^5~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0946b8c5c5982088a26da7ad99e8bcf57f972fb5;p=pandora-kernel.git

ARM: 6517/1: kexec: Add missing memory clobber to inline asm in crash_setup_regs()

Currently, the inline asm is passed &newregs->ARM_r0 as in input,
when modifying multiple fields of newregs.

It's plausible to assume that GCC will assume newregs->ARM_r0 is
modified when passed the address, but unfortunately this assumption
is incorrect.

Also, GCC has no way to guess that the other ARM_r* fields are
modified without the addition of a "memory" clobber.

Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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