linux-kernel - Re: [patch 05/28] drivers: Remove BKL from drivers/char/misc.c

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 11 Oct 2009 21:24:00 +0200
From:	Arnd Bergmann <arndbergmann@...glemail.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Vincent Sanders <vince@...tec.co.uk>,
	John Kacur <jkacur@...hat.com>,
	Jonathan Corbet <corbet@....net>,
	Christoph Hellwig <hch@...radead.org>,
	"Greg Kroah-Hartman" <gregkh@...e.de>
Subject: Re: [patch 05/28] drivers: Remove BKL from drivers/char/misc.c

On Saturday 10 October 2009, Thomas Gleixner wrote:
> misc_open() is already serialized with misc_mtx. Remove the BKL
> locking which got there via the BKL pushdown.

This only works as long as all misc drivers also don't need the BKL
in /their/ open methods. I believe that we did a pushdown into them
last year, but new ones may have crept up.

I guess we really should have kill this one off back then, but somehow
it was forgotten about.

	Arnd <><
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/