From: Arnd Bergmann <arnd.bergmann@linaro.org>
To: John Stultz <john.stultz@linaro.org>
Cc: "Greg KH" <gregkh@linuxfoundation.org>,
"Colin Cross" <ccross@android.com>,
"Arve Hjønnevåg" <arve@android.com>,
"Serban Constantinescu" <serban.constantinescu@arm.com>,
"Android Kernel Team" <kernel-team@android.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: Fwd: [RFC][PATCH] staging: Fix build issues with new binder API
Date: Thu, 27 Feb 2014 20:15:23 +0100 [thread overview]
Message-ID: <201402272015.24077.arnd.bergmann@linaro.org> (raw)
In-Reply-To: <530E6B56.8060405@linaro.org>
On Wednesday 26 February 2014, John Stultz wrote:
> The new 64bit binder API causes build issues on 32bit ARM
> due to the lack of 64bit __get_user_asm_* implementation.
It is impossible to implement this. Many have tried before.
> Until that implementation is done, remove the choice for
> 32bit ARM, automatically enabling the old 32bit binder
> protocol.
>
> This can be reverted once a 64bit __get_user_asm_*
> implementation is merged.
I think the best solution is to use __copy_from_user for
the 64-bit access. You can wrap it in a helper function
if you want to speed up the native-word-size case.
Arnd
next prev parent reply other threads:[~2014-02-27 19:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-26 22:29 [RFC][PATCH] staging: Fix build issues with new binder API John Stultz
2014-02-27 3:34 ` Greg KH
2014-02-27 19:04 ` John Stultz
2014-02-27 19:12 ` Greg KH
[not found] ` <530E6B56.8060405@linaro.org>
2014-02-27 19:15 ` Arnd Bergmann [this message]
2014-02-27 19:20 ` Fwd: " John Stultz
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