linux-kernel - devtmpfs [censored] oddities

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Message-ID: <20091216080431.GF14381@ZenIV.linux.org.uk>
Date:	Wed, 16 Dec 2009 08:04:31 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	linux-kernel@...r.kernel.org
Cc:	Kay Sievers <kay.sievers@...y.org>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: devtmpfs [censored] oddities

	May I respectfully suggest that a blocking operation (such as
kstrdup with GFP_KERNEL, or grabbing a mutex, or, say it, pathname resolution)
is not quite the thing to do while holding an rwlock?

	As it is, any device_add() is an embarrassingly obvious deadlock
waiting to happen...
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