linux-kernel - Re: [PATCH 1/2] sunrpc: add missing spin

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Message-Id: <20061105114533.4f57f333.akpm@osdl.org>
Date:	Sun, 5 Nov 2006 11:45:33 -0800
From:	Andrew Morton <akpm@...l.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>, riesebie@...ec.de
Cc:	Akinobu Mita <akinobu.mita@...il.com>,
	linux-kernel@...r.kernel.org, Andy Adamson <andros@...i.umich.edu>,
	"J. Bruce Fields" <bfields@...i.umich.edu>,
	Trond Myklebust <Trond.Myklebust@...app.com>,
	Olaf Kirch <okir@...ad.swb.de>
Subject: Re: [PATCH 1/2] sunrpc: add missing spin_unlock

On Sun, 05 Nov 2006 17:35:16 +0100
Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:

> On Sun, 2006-10-29 at 22:37 +0900, Akinobu Mita wrote:
> > auth_domain_put() forgot to unlock acquired spinlock.
> > 
> > Cc: Olaf Kirch <okir@...ad.swb.de>
> > Cc: Andy Adamson <andros@...i.umich.edu>
> > Cc: J. Bruce Fields <bfields@...i.umich.edu>
> > Cc: Trond Myklebust <Trond.Myklebust@...app.com>
> > Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
> 
> Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> 
> I just found this too while trying to get .19-rc4-git up and running on
> a machine here - took me a few hours.
> 
> It made my kernel decidedly unhappy :-(
> 
> Andrew, could you push this and:
>   http://lkml.org/lkml/2006/11/3/109
> into .19 still? - those patches are needed to make todays git happy on
> my machine.

OK.

> > Index: work-fault-inject/net/sunrpc/svcauth.c
> > ===================================================================
> > --- work-fault-inject.orig/net/sunrpc/svcauth.c
> > +++ work-fault-inject/net/sunrpc/svcauth.c
> > @@ -126,6 +126,7 @@ void auth_domain_put(struct auth_domain 
> >  	if (atomic_dec_and_lock(&dom->ref.refcount, &auth_domain_lock)) {
> >  		hlist_del(&dom->hash);
> >  		dom->flavour->domain_release(dom);
> > +		spin_unlock(&auth_domain_lock);
> >  	}
> >  }

I wonder if this will fix http://bugzilla.kernel.org/show_bug.cgi?id=7457
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