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

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Message-ID: <510AFAAC.8020609@zytor.com>
Date:	Thu, 31 Jan 2013 15:13:48 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Rolf Eike Beer <eike-kernel@...tec.de>
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

On 01/31/2013 02:10 PM, Rolf Eike Beer wrote:
> 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?
> 

compat_ioctl should be CONFIG_COMPAT.

	-hpa


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