linux-kernel - Re: [PATCH] autofs4: fix compilation without CONFIG

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Date:	Sat, 25 Feb 2012 17:46:39 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Andreas Schwab <schwab@...ux-m68k.org>,
	Ian Kent <raven@...maw.net>,
	David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, autofs@...r.kernel.org,
	Thomas Meyer <thomas@...3r.de>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH] autofs4: fix compilation without CONFIG_COMPAT

On 02/25/2012 05:31 PM, Linus Torvalds wrote:
> On Sat, Feb 25, 2012 at 2:10 PM, Andreas Schwab <schwab@...ux-m68k.org> wrote:
>> The compat_daemon stuff is only needed on x86-64, and is_compat_task is
>> only defined with CONFIG_COMPAT, so disable it for all other
>> configurations.
> 
> Ugh, I hate the proliferation of #ifdefs in code when they aren't
> really necessary.
> 
> How about this patch instead? It's small, simple, and clean. Maybe it
> would even allow a few other #ifdef's to be removed (I see one in
> kernel/seccomp.c, for example, although I suspect that
> 'mode1_syscalls_32' might also be a compat-only thing, so who knows)
> 
> And if you worry about the size of autofs_sb_info, I think that could
> be made denser by using 'char' or bitfields instead of the various
> ints that hold small values or flags instead.
> 

I think this patch could help clean up other places, too.

	-hpa


-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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