linux-kernel - Re: [PATCH v3 0/6] Android Binder IPC Fixes

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Message-ID: <517F8652.4070103@arm.com>
Date:	Tue, 30 Apr 2013 09:52:34 +0100
From:	Serban Constantinescu <Serban.Constantinescu@....com>
To:	"Kirill A. Shutemov" <kirill@...temov.name>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"kernel-team@...roid.com" <kernel-team@...roid.com>,
	"arve@...roid.com" <arve@...roid.com>,
	"john.stultz@...aro.org" <john.stultz@...aro.org>,
	Dave Butcher <Dave.Butcher@....com>
Subject: Re: [PATCH v3 0/6] Android Binder IPC Fixes

Hi Kirill,

On 30/04/13 08:31, Kirill A. Shutemov wrote:
> On Fri, Apr 12, 2013 at 01:25:49PM +0100, Serban Constantinescu wrote:
>> The patch set has been successfully tested with a 64bit Linux userspace and
>> 64bit binder unit-tests.
>>
>> This patch set has been successfully tested on 32bit platforms(ARMv7 VExpress)
>> and 64bit platforms(ARMv8 RTSM) running a 32bit Android userspace and an in
>> kernel binder compat layer.
>
> I've tried to replace ugly hack with your patches to be able to boot
> 32-bit userspace on x86-64. It fails. :(
>

This patch set fixes the binder interface so that it works on 32/32 or 
64/64 systems and preps the driver for the compat layer - 64bit 
kernel/32bit userspace. As discussed with the Android developers the 
binder compat will live in the userspace. Thus for a 64bit kernel the 
calls coming from 32 or 64bit file-systems will look alike.

Thus for the moment it won't work.

Thanks,
Serban

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