linux-kernel - Re: 3.9-rc1 regression in arm dtb build

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5155C9C6.4070702@wwwdotorg.org>
Date:	Fri, 29 Mar 2013 11:05:10 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Olof Johansson <olof@...om.net>
CC:	Pavel Machek <pavel@....cz>,
	Grant Likely <grant.likely@...retlab.ca>,
	kernel list <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: 3.9-rc1 regression in arm dtb build

On 03/28/2013 01:54 PM, Olof Johansson wrote:
> On Thu, Mar 28, 2013 at 08:33:23PM +0100, Pavel Machek wrote:
>> On Thu 2013-03-28 08:49:20, Stephen Warren wrote:
>>> On 03/28/2013 03:29 AM, Pavel Machek wrote:
>>> ...
>>>> There's change that makes it pretty much impossible to build dtbs
>>>> reliably between different kernel versions, because it leaves old dtbs
>>>> around, and they survive even make clean.
>>>
>>> One question here: Presumably the dtbs don't survive "make clean" if you
>>> run that right after building the dtbs, but only if you check out a new
>>> kernel version before running clean? Or is that not the case?
>>
>> That was the case I seen, yes.
>>
>> Have old kernel running, dtbs building. Apply a patch. It starts
>> behaving weird. You do make clean... but you still get old dtbs.
>>
>> (It would be nice if make socfpga_cyclone5.dtb would magically remove
>> all the dtbs from old location; make dtbs does that if I understand
>> stuff correctly).
> 
> 
> This takes care of the "make dtbs" case (or just "make" case), but not
> when you build a specific target.

I guess to really solve this, we need the following changes:

In the all kernels:

For both arch/*/boot and arch/*/boot/dts: clean removes *.dtb

In kernels that build *.dtb in the new location:

make dtbs and make foo.dtb both rm ../*.dtb

In kernels that build *.dtb in the old location:

make dtbs and make foo.dtb both rm dts/*.dtb

Is that too much to retrofit into all the stable kernels?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/