linux-kernel - Re: [PATCHv3] ARM: Sort exception table at compile time

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Message-ID: <20121025122754.GF11267@mudshark.cambridge.arm.com>
Date:	Thu, 25 Oct 2012 13:27:55 +0100
From:	Will Deacon <will.deacon@....com>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	Russell King <linux@....linux.org.uk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	David Daney <david.daney@...ium.com>
Subject: Re: [PATCHv3] ARM: Sort exception table at compile time

On Thu, Oct 25, 2012 at 01:44:42AM +0100, Stephen Boyd wrote:
> Add the ARM machine identifier to sortextable and select the
> config option so that we can sort the exception table at compile
> time. sortextable relies on a section named __ex_table existing
> in the vmlinux, but ARM's linker script places the exception
> table in the data section. Give the exception table its own
> section so that sortextable can find it.
> 
> This allows us to skip the sorting step during boot.
> 
> Cc: David Daney <david.daney@...ium.com>
> Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
> ---

Just had a play with this for my A15 platform and it seems to work fine when
targetting either ARM or Thumb-2 kernels.

Tested-by: Will Deacon <will.deacon@....com>

Cheers,

Will
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