From: Dave Martin <dave.martin@linaro.org>
Date: Wed, 1 Dec 2010 17:05:14 +0000 (+0100)
Subject: ARM: 6518/1: kexec: Fix crash_setup_regs() for ARMv7 and CONFIG_THUMB2_KERNEL
X-Git-Tag: v2.6.38-rc1~471^2~5^5~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cd849ae9cd291117c0f7e0e8d531ab62a906e308;p=pandora-kernel.git

ARM: 6518/1: kexec: Fix crash_setup_regs() for ARMv7 and CONFIG_THUMB2_KERNEL

  * Fix kexec build failure with CONFIG_THUMB2_KERNEL.

  * Avoids deprecated/forbidden sp and pc usage in for ARMv7
    onwards, retaining compatibility with older architecture
    versions.

  * The pc value saved to newregs is now aligned on a predictable
    instruction boundary.

    (stmia { ... pc } or str pc has implementation-defined results
    in most versions of the ARM architecutre, and is prohibited
    (unpredictable) in Thumb-2.)

  * Switch to named inline asm arguments (else I get readily
    confused ...)

    The resulting code should be compatible with all architecture
    versions >= v3, with or without CONFIG_THUMB2_KERNEL.

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

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