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

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Message-ID: <m2ipzryoz2.fsf@igel.home>
Date:	Sun, 21 Nov 2010 11:01:53 +0100
From:	Andreas Schwab <schwab@...ux-m68k.org>
To:	Shawn Bohrer <sbohrer@...advisors.com>
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

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))

Andreas.

-- 
Andreas Schwab, schwab@...ux-m68k.org
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