linux-kernel - Re: [RFC][PATCH] staging: Fix build issues with new binder API

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Date:	Thu, 27 Feb 2014 11:04:01 -0800
From:	John Stultz <john.stultz@...aro.org>
To:	Greg KH <gregkh@...uxfoundation.org>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Colin Cross <ccross@...roid.com>,
	Arve Hjønnevåg <arve@...roid.com>,
	Serban Constantinescu <serban.constantinescu@....com>,
	Android Kernel Team <kernel-team@...roid.com>,
	Arnd Bergmann <arnd.bergmann@...aro.org>
Subject: Re: [RFC][PATCH] staging: Fix build issues with new binder API

On 02/26/2014 07:34 PM, Greg KH wrote:
> On Wed, Feb 26, 2014 at 02:29:07PM -0800, John Stultz wrote:
>> The new 64bit binder API causes build issues on 32bit ARM
>> due to the lack of 64bit __get_user_asm_* implementation.
> So no one ever tested this out on ARM?  Really, that seems odd...

Its my bad, I was focused on the 32bit legacy compatibility code in my
testing because the userspace I have only works with that.

Arve actually warned about this in one of his mails, but I mistakenly
thought it was an issue w/ 3.10 and earlier kernels and had since been
addressed.

> Anyway, if you want this to always be on, that's fine with me, your
> choice :)

I think its the best option for now, but wanted to send it out for
comment to see if anyone objected.

I'm about to head for a conference so I'll be offline until around
Monday. While at the conference I'm going to be working with folks to
see if we can't get the real solution (a __get_user_asm_64
implementation) sorted.  But if there are no objections, it might be
best to queue this for staging-next so folks don't hit the issue in the
meantime.

thanks
-john

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