linux-kernel - Re: [PATCH v2] sparc: Clean up linker script using new linker script macros.

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Message-Id: <20090916.103019.253722423.davem@davemloft.net>
Date:	Wed, 16 Sep 2009 10:30:19 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	tabbott@...lice.com
Cc:	sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org,
	sam@...nborg.org, geofft@...lice.com
Subject: Re: [PATCH v2] sparc: Clean up linker script using new linker
 script macros.

From: Tim Abbott <tabbott@...lice.com>
Date: Wed, 16 Sep 2009 13:27:43 -0400 (EDT)

> On Wed, 16 Sep 2009, David Miller wrote:
> 
>> Can you do this cleanup without moving the relative locations of .data
>> and .data1 sections?
> 
> Yes, if you just swap RW_DATA_SECTION and .data1 so it looks like
> 
> RW_DATA_SECTION(SMP_CACHE_BYTES, 0, THREAD_SIZE)
> .data1 : {
> 	*(.data1)
> }
> 
> instead, that would preserve their relative locations.
> 
> Currently, switching to RW_DATA_SECTION would still result in a change in 
> their relative position that .data.page_aligned and .data.nosave would be 
> between .data and .data1 (not sure if that is relevant on sparc). (this 
> will change when <http://lkml.org/lkml/2009/9/16/396> is merged).

I don't know which, if any, are relevant or could cause problems.

It's hard for me to ACK this because it's not a straight nop
transformation, which we could at least presume would function
properly if the macros were implemented correctly.
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