linux-kernel - Re: [PATCH V3] ARM: add missing linker section markup to head-common.S

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Date:	Fri, 5 Jul 2013 22:32:15 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Stephen Warren <swarren@...dotorg.org>
Cc:	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Will Deacon <will.deacon@....com>,
	Joseph Lo <josephl@...dia.com>, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-tegra@...r.kernel.org,
	Stephen Warren <swarren@...dia.com>
Subject: Re: [PATCH V3] ARM: add missing linker section markup to
	head-common.S

On Fri, Jul 05, 2013 at 12:10:55PM -0600, Stephen Warren wrote:
> From: Stephen Warren <swarren@...dia.com>
> 
> Macro __INIT is used to place various code in head-common.S into the init
> section. This should be matched by a closing __FINIT. Also, add an
> explicit ".text" to ensure subsequent code is placed into the correct
> section; __FINIT is simply a closing marker to match __INIT and doesn't
> guarantee to revert to .text.
> 
> This historically caused no problem, because macro __CPUINIT was used at
> the exact location where __FINIT was missing, which then placed following
> code into the cpuinit section. However, with commit 22f0a2736 "init.h:
> remove __cpuinit sections from the kernel" applied, __CPUINIT becomes a
> no-op, thus leaving all this code in the init section, rather than the
> regular text section. This caused issues such as secondary CPU boot
> failures or crashes.
> 
> Signed-off-by: Stephen Warren <swarren@...dia.com>
> Acked-by: Paul Gortmaker <paul.gortmaker@...driver.com>
> ---
> v3: Added .text after __FINIT to force the correct section.
> v2: Moved __FINIT after lookup_processor_type, to correctly match the
> location of __CPUINIT.

Much better, thanks.  Please put it in the patch system and I'll send it
along, thanks.
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