LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: David Brownell <david-b@pacbell.net>
To: Peter Zijlstra <peterz@infradead.org>
Cc: mingo@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [patch 2.6.25-rc3] lockdep:  add spin_lock_irq_nested()
Date: Tue, 26 Feb 2008 02:36:16 -0800	[thread overview]
Message-ID: <200802260236.17188.david-b@pacbell.net> (raw)
In-Reply-To: <1204019626.6242.225.camel@lappy>

On Tuesday 26 February 2008, Peter Zijlstra wrote:
> 
> 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
> > > +
> > > +	...
> 
> Glad to hear this works out for you.

Yeah, glad to have a localized fix rather than mucking with genirq.


> 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.

Hmm, then kernel/irq/handle.c shouldn't need #ifdefs either ... ;)


  reply	other threads:[~2008-02-26 10:36 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-25 22:33 David Brownell
2008-02-26  9:53 ` Peter Zijlstra
2008-02-26 10:36   ` David Brownell [this message]
  -- strict thread matches above, loose matches on Subject: below --
2008-01-18 22:29 [patch/rfc 2.6.24-rc8-git] genirq: partial lockdep fixes David Brownell
2008-01-21  8:31 ` Peter Zijlstra
2008-01-21 18:22   ` David Brownell
2008-02-25  4:33     ` [patch 2.6.25-rc3] lockdep: add spin_lock_irq_nested() David Brownell
2008-02-25 10:20       ` Peter Zijlstra
2008-02-25 11:21         ` David Brownell
2008-02-25 13:17           ` Peter Zijlstra
2008-02-25 21:10             ` David Brownell

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=200802260236.17188.david-b@pacbell.net \
    --to=david-b@pacbell.net \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@redhat.com \
    --cc=peterz@infradead.org \
    --subject='Re: [patch 2.6.25-rc3] lockdep:  add spin_lock_irq_nested()' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).