linux-kernel - Re: [PATCH] parisc: unbreak automounter support on 64-bit kernel with 32-bit userspace

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Message-ID: <1470501.uiZyX6kBKo@donald.sf-tec.de>
Date:	Thu, 31 Jan 2013 23:10:10 +0100
From:	Rolf Eike Beer <eike-kernel@...tec.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	James Bottomley <James.Bottomley@...senpartnership.com>,
	Helge Deller <deller@....de>, linux-parisc@...r.kernel.org,
	linux-kernel@...r.kernel.org, Ian Kent <raven@...maw.net>,
	autofs@...r.kernel.org
Subject: Re: [PATCH] parisc: unbreak automounter support on 64-bit kernel with 32-bit userspace

H. Peter Anvin wrote:
> On 01/31/2013 01:42 PM, James Bottomley wrote:
> > On Thu, 2013-01-31 at 13:29 -0800, H. Peter Anvin wrote:
> >> On 01/31/2013 12:26 PM, James Bottomley wrote:
> >>> [adding autofs list and maintainer for their perusal and ack, although
> >>> this is an obvious fix to me
> >>> 
> >>> James]
> >> 
> >> The #if list probably should be inverted, and only specific platforms
> >> should have unsigned long...
> > 
> > The whitelist is 64 bit only platforms, like ia64, isn't it?  So yes,
> > they're far less numerous.
> 
> Correct.  It is basically the 64-bit platforms without any 32-bit
> userspace, like Alpha and IA64.

Arm64? Should this be a CONFIG_ARCH_CAN_HAVE_32BIT_USERSPACE that would cover 
this? And may e.g. be used to remove compat_ioctl on those archs, too?

Eike
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