[PATCH v3] arm64, ia64, ppc, s390, sh, tile, um, x86, mm: Remove default gate area

[richard@nod.at (Richard Weinberger)]

Am 18.07.2014 12:14, schrieb Will Deacon:
> On Tue, Jul 15, 2014 at 03:47:26PM +0100, Andy Lutomirski wrote:
>> On Sun, Jul 13, 2014 at 1:01 PM, Andy Lutomirski <luto@amacapital.net> wrote:
>>> The core mm code will provide a default gate area based on
>>> FIXADDR_USER_START and FIXADDR_USER_END if
>>> !defined(__HAVE_ARCH_GATE_AREA) && defined(AT_SYSINFO_EHDR).
>>>
>>> This default is only useful for ia64.  arm64, ppc, s390, sh, tile,
>>> 64-bit UML, and x86_32 have their own code just to disable it.  arm,
>>> 32-bit UML, and x86_64 have gate areas, but they have their own
>>> implementations.
>>>
>>> This gets rid of the default and moves the code into ia64.
>>>
>>> This should save some code on architectures without a gate area: it's
>>> now possible to inline the gate_area functions in the default case.
>>
>> Can one of you pull this somewhere?  Otherwise I can put it somewhere
>> stable and ask for -next inclusion, but that seems like overkill for a
>> single patch.

For the um bits:
Acked-by: Richard Weinberger <richard@nod.at>

> I'd be happy to take the arm64 part, but it doesn't feel right for mm/*
> changes (or changes to other archs) to go via our tree.
> 
> I'm not sure what the best approach is if you want to send this via a single
> tree. Maybe you could ask akpm nicely?

Going though Andrew's tree sounds sane to me.

Thanks,
//richard