linux-kernel - Re: [patch 3/4] timerfd: Implement timerfd_ioctl method to restore timerfd

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Message-ID: <20140702190706.GH12440@moon>
Date:	Wed, 2 Jul 2014 23:07:06 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Christopher Covington <cov@...eaurora.org>,
	linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrey Vagin <avagin@...nvz.org>,
	Pavel Emelyanov <xemul@...allels.com>,
	Vladimir Davydov <vdavydov@...allels.com>,
	Linux ARM kernel mailing list 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [patch 3/4] timerfd: Implement timerfd_ioctl method to restore
 timerfd_ctx::ticks

On Wed, Jul 02, 2014 at 09:01:02PM +0200, Arnd Bergmann wrote:
> > > 
> > > 64-bit get_user is currently unsupported on ARM, although it appears work is
> > > ongoing [1].
> > > 
> > > 1. https://lkml.org/lkml/2014/6/17/260
> > 
> > Thanks for info, Christopher! What arm camp is using then, copy-from-user?
> > 
> 
> copy_from_user should work on all architectures. I believe a 64-bit get_user
> is currently unsupported on most 32-bit architectures, x86-32 being a notable
> exception.

Thanks, I'll update.
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