linux-kernel - Re: [PATCH v3 32/71] ARC: [DeviceTree] Basic support

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Date:	Tue, 29 Jan 2013 10:06:31 +0000
From:	James Hogan <james.hogan@...tec.com>
To:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
CC:	<linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<arnd@...db.de>, Grant Likely <grant.likely@...retlab.ca>,
	<devicetree-discuss@...ts.ozlabs.org>,
	Rob Herring <rob.herring@...xeda.com>
Subject: Re: [PATCH v3 32/71] ARC: [DeviceTree] Basic support

Hi Vineet,

>> arm64 also adds dtbs and $(dtb-y) to targets (at least in linux-next). I
>> think this makes sure that they don't get rebuilt unless they've
>> actually changed. I've also copied this for metag.
> 
> Did you verify that it makes a difference - at least at my end it's not - the
> default dtb is getting rebuilt everytime. I need to debug this some more.

Yeh, for me it prevents the following build lines appearing every time:
DTC     arch/metag/boot/dts/tz1090_01sp.dtb

but it still does these every time:
DTB    arch/metag/boot/dts/tz1090_01sp.dtb.S
AS      arch/metag/boot/dts/tz1090_01sp.dtb.o

Adding dtbs o targets actually didn't seem to be necessary with $(dtb-y)
added.

Cheers
James

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