linux-kernel - Re: [PATCH 2/2] Kbuild: Use dtc's -d (dependency) option

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Message-ID: <20120110031220.GC23362@S2101-09.ap.freescale.net>
Date:	Tue, 10 Jan 2012 11:12:22 +0800
From:	Shawn Guo <shawn.guo@...aro.org>
To:	Stephen Warren <swarren@...dia.com>
Cc:	Michal Marek <mmarek@...e.cz>, Jon Loeliger <jdl@....com>,
	David Gibson <david@...son.dropbear.id.au>,
	Russell King <linux@....linux.org.uk>,
	linux-c6x-dev@...ux-c6x.org, Aurelien Jacquiot <a-jacquiot@...com>,
	Devicetree Discuss <devicetree-discuss@...ts.ozlabs.org>,
	microblaze-uclinux@...e.uq.edu.au, linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Rob Herring <rob.herring@...xeda.com>,
	linuxppc-dev@...ts.ozlabs.org, linux@...ts.openrisc.net,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/2] Kbuild: Use dtc's -d (dependency) option

On Mon, Jan 09, 2012 at 11:38:15AM -0700, Stephen Warren wrote:
> This hooks dtc into Kbuild's dependency system.
> 
> Thus, for example, "make dtbs" will rebuild tegra-harmony.dtb if only
> tegra20.dtsi has changed yet tegra-harmony.dts has not. The previous
> lack of this feature recently caused me to have very confusing "git
> bisect" results.
> 
> For ARM, it's obvious what to add to $(targets). I'm not familiar enough
> with other architectures to know what to add there. Powerpc appears to
> already add various .dtb files into $(targets), but the other archs may
> need something added to $(targets) to work.
> 
> Signed-off-by: Stephen Warren <swarren@...dia.com>

Though I did not look into the patches deeply, I know the problem very
well and it annoys me a lot.  It's great that we have patches to fix
it, so

Acked-by: Shawn Guo <shawn.guo@...aro.org>

-- 
Regards,
Shawn
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