linux-kernel - Re: [patch 2.6.25-rc3] lockdep: add spin_lock_irq

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]

Message-Id: <1204019626.6242.225.camel@lappy>
Date:	Tue, 26 Feb 2008 10:53:46 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	David Brownell <david-b@...bell.net>
Cc:	mingo@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [patch 2.6.25-rc3] lockdep:  add spin_lock_irq_nested()


On Mon, 2008-02-25 at 14:33 -0800, David Brownell wrote:

> > +#ifdef CONFIG_LOCKDEP
> > +
> > +/* tell lockdep that this IRQ's locks and its parent's locks are in
> > + * different categories, so that it won't detect false recursion.
> > + */
> > +static struct lock_class_key gpio_lock_class;
> > +
> > +static inline void mark_gpio_locking(unsigned gpio_irq)
> > +{
> > +	lockdep_set_class(&irq_desc[gpio_irq].lock, &gpio_lock_class);
> > +}
> > +
> > +#else
> > +
> > +static inline void mark_gpio_locking(unsigned gpio_irq)
> > +{
> > +	/* NOP */
> > +}
> > +
> > +#endif

Glad to hear this works out for you.

Just one note, you don't need the #ifdef mess here. struct
lock_class_key is 0 bytes on !LOCKDEP and lockdep_set_class*() is
defined away as well.


--
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/