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

[Serban Constantinescu]

On 30/04/13 11:04, Kirill A. Shutemov wrote:
> On Tue, Apr 30, 2013 at 09:52:34AM +0100, Serban Constantinescu wrote:
> > 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.
>
> Does the compat layer already exist or it's a plan?
We were working with a kernel compat layer. However this wasn't 
encouraged by the Android developers who would prefer a userspace binder 
compat.

The changes in this patch set fix the kernel interface so that it will 
work with the yet to be developed userspace wrapper.

Some support for 64/32 systems has already been integrated - see ashmem.

Thanks,
Serban

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