linux-kernel - Re: [PATCH] perf: Handle DT_UNKNOWN on filesystems that don't support d

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Date:	Sun, 21 Nov 2010 09:54:33 -0600
From:	Shawn Bohrer <sbohrer@...advisors.com>
To:	Andreas Schwab <schwab@...ux-m68k.org>
Cc:	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf: Handle DT_UNKNOWN on filesystems that don't
 support d_type

On Sun, Nov 21, 2010 at 11:01:53AM +0100, Andreas Schwab wrote:
> Shawn Bohrer <sbohrer@...advisors.com> writes:
> 
> > +		if (((lang_dirent.d_type == DT_DIR &&			\
> > +		      lang_dirent.d_type != DT_UNKNOWN) ||		\
> > +		     (lang_dirent.d_type == DT_UNKNOWN &&		\
> > +		      is_directory(scripts_path, &lang_dirent))) &&	\
> 
> 		if ((lang_dirent.d_type == DT_DIR ||			\
> 		     (lang_dirent.d_type == DT_UNKNOWN &&		\
> 		      is_directory(scripts_path, &lang_dirent))) &&	\
> 
> > +		if ((script_dirent.d_type != DT_DIR &&			\
> > +		     script_dirent.d_type != DT_UNKNOWN) ||		\
> > +		    (script_dirent.d_type == DT_UNKNOWN &&		\
> > +		     !is_directory(lang_path, &script_dirent)))
> 
> 		if (script_dirent.d_type != DT_DIR &&			\
> 		    (script_dirent.d_type != DT_UNKNOWN ||		\
> 		     !is_directory(lang_path, &script_dirent)))
> 
> (DeMorgan: !(a && b) <-> (!a || !b); !(a || b) <-> (!a && !b))

Thanks Andreas, I'll send a follow up patch with the cleanup.

--
Shawn
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