linux-kernel - Re: [RFC][PATCH] extable: Make sure all archs define

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Message-ID: <4DD67A90.7010908@twiddle.net>
Date:	Fri, 20 May 2011 07:28:32 -0700
From:	Richard Henderson <rth@...ddle.net>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Matt Turner <mattst88@...il.com>, linux-alpha@...r.kernel.org,
	Hirokazu Takata <takata@...ux-m32r.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Roman Zippel <zippel@...ux-m68k.org>,
	linux-m68k@...r.kernel.org, Ralf Baechle <ralf@...ux-mips.org>,
	Kyle McMartin <kyle@...artin.ca>, Helge Deller <deller@....de>,
	"JamesE.J.Bottomley" <jejb@...isc-linux.org>
Subject: Re: [RFC][PATCH] extable: Make sure all archs define _sdata

On 05/19/2011 06:34 PM, Steven Rostedt wrote:
> Can I get an Acked-by (or comment) from the following Maintainers:
> 
>   alpha
>   m32r
>   m68k
>   mips
>   parisc
> 
> Ingo has discovered that one of my patches broke the builds of these
> architectures. Although he added a quick fix, this patch supplies the
> proper fix and touches the affected architectures. Please review and Ack
> (or NACK with guidance) this patch.
> 
> -- Steve
> 
> A new utility function is used to determine if a passed in address is
> part of core kernel data or not. It may or may not return true for RO
> data, but this utility must work for RW data. Thus both _sdata and
> _edata must be defined and continuous, without .init sections that may
> later be freed and replaced by volatile memory (memory that can be
> freed).
> 
> This utility function is used to determine if data is safe from ever
> being freed. Thus it should return true for all RW global data that is
> not in a module or has been allocated, or false otherwise.
> 
> Signed-off-by: Steven Rostedt <rostedt@...dmis.org>

Acked-by: Richard Henderson <rth@...ddle.net>

Although I suppose if we're supposedly standardizing on _sdata,
the two uses of _data in arch/alpha/mm/ could be transitioned.


r~
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