Date: Fri, 4 Dec 2015 17:18:56 +0000
From: Catalin Marinas <catalin.marinas@arm.com>
To: Yury Norov <ynorov@caviumnetworks.com>
Cc: arnd@arndb.de, pinskia@gmail.com, Prasun.Kapoor@caviumnetworks.com,
        schwab@suse.de, Nathan_Lynch@mentor.com, linux-kernel@vger.kernel.org,
        agraf@suse.de, klimov.linux@gmail.com, broonie@kernel.org,
        jan.dakinevich@gmail.com, joseph@codesourcery.com,
        ddaney.cavm@gmail.com, bamvor.zhangjian@huawei.com,
        philipp.tomsich@theobroma-systems.com, andrey.konovalov@linaro.org,
        linux-arm-kernel@lists.infradead.org,
        christoph.muellner@theobroma-systems.com
Subject: Re: [RFC2 PATCH v6 00/19] ILP32 for ARM64
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On Fri, Dec 04, 2015 at 06:35:50PM +0300, Yury Norov wrote:
> On Thu, Dec 03, 2015 at 05:59:55PM +0000, Catalin Marinas wrote:
> > On Wed, Nov 18, 2015 at 12:16:40AM +0300, Yury Norov wrote:
> > >  - ILP32 VDSO code excluded. It's not mandatory, and caused questions
> > >    during review process. We definitely make sure we will follow up
> > >    with a VDSO later on because it is needed for performance reasons;
> > 
> > I already asked in one of the patches, don't you need a VDSO for
> > sigreturn?
> 
> I didn't realise it's mandatory for ARMv8 when removed it. I'll back
> it, but I think rework required anyway.

The alternative is to use SA_RESTORER but AFAIK, its use has been
deprecated. I don't know what aarch64 glibc does if it doesn't have a
vdso.

-- 
Catalin
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