linux-kernel - Re: [PATCH] arm64: Enable CONFIG

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Date:	Mon, 8 Dec 2014 10:10:26 +0000
From:	Will Deacon <will.deacon@....com>
To:	Alexander Graf <agraf@...e.de>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	Michael Matz <matz@...e.de>
Subject: Re: [PATCH] arm64: Enable CONFIG_COMPAT also for 64k page size

On Sat, Dec 06, 2014 at 05:23:59PM +0000, Alexander Graf wrote:
> On 04.12.14 19:20, Will Deacon wrote:
> > On Thu, Dec 04, 2014 at 03:46:33PM +0000, Alexander Graf wrote:
> >> With binutils 2.25 the default alignment for 32bit arm sections changed to
> >> have everything 64k aligned. Armv7 binaries built with this binutils version
> >> run successfully on an arm64 system.
> >>
> >> Since effectively there is now the chance to run armv7 code on arm64 even
> >> with 64k page size, it doesn't make sense to block people from enabling
> >> CONFIG_COMPAT on those configurations.
> > 
> > Is there a distro available that is built with a recent enough binutils for
> > this? I'd really like to run our regression tests to check that page-size
> > assumptions don't exist for things like shm.
> 
> So how much of a distro do you need? I could probably assemble a simple
> very minimalistic rootfs with only bash if that helps.

I'd like to run LTP, so I'd probably need slightly more than that but I
certainly don't need the whole world.

Will
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