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

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Date:	Thu, 27 Feb 2014 11:12:04 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	John Stultz <john.stultz@...aro.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 Thu, Feb 27, 2014 at 11:04:01AM -0800, John Stultz wrote:
> 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.

Yes, the "real" solution would be best, but I'll queue this up for now,
thanks.

greg k-h
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