linux-kernel - Re: Regression: WARNINGS and lockdep spews in 2.6.38-rc3+ (bisected).

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 for Android: free password hash cracker in your pocket

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

Date:	Thu, 03 Feb 2011 10:30:40 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Yong Zhang <yong.zhang0@...il.com>
Cc:	Nick Bowler <nbowler@...iptictech.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: Regression: WARNINGS and lockdep spews in 2.6.38-rc3+
 (bisected).

On Thu, 2011-02-03 at 17:12 +0800, Yong Zhang wrote:
>  #ifdef CONFIG_LOCKDEP
> +       unsigned long flags;
> +
>         local_bh_disable();
>         lock_map_acquire(&timer->lockdep_map);
>         lock_map_release(&timer->lockdep_map);
> -       local_bh_enable();
> +       /* raw_local_irq_[save|restore] is to protect _local_bh_enable() */
> +       raw_local_irq_save(flags);
> +       _local_bh_enable();
> +       raw_local_irq_restore(flags);
>  #endif 

_why_ are you doing the raw_local_irq stuff? That's just weird, and that
comment isn't helping.

Also, calling _local_bh_enable() will leave pending softirqs, not
particularly nice

--
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/