linux-kernel - Re: sysfs root link count broken in 2.6.22-git5

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Message-ID: <Pine.LNX.4.64.0707191802050.31013@fbirervta.pbzchgretzou.qr>
Date:	Thu, 19 Jul 2007 18:02:45 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Jean Delvare <khali@...ux-fr.org>
cc:	Kay Sievers <kay.sievers@...y.org>, Greg KH <gregkh@...e.de>,
	Tejun Heo <htejun@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: sysfs root link count broken in 2.6.22-git5


On Jul 19 2007 10:41, Jean Delvare wrote:
>> Well, just check if /sys/devices/ exists, that should be cheap enough. :)
>
>Yes, this is a possibility, and one I had considered at first. But I
>wasn't sure which subdirectory to check. sysfs isn't well known for its
>stability, and I didn't know which directories exist since the
>early days of sysfs, and which do not. For example, fs, kernel and
>module were not present in 2.6.5. I am also not sure if directories
>which exist today are guaranteed to exist forever. This is the reason
>why I decided to check the link count instead, basically checking that
>at least one subdirectory exists, without having to name it.

If anything exists, it is likely to be mounted.
opendir, 3x readdir, exit the loop, done :)


	Jan
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