linux-kernel - Re: [PATCH] Fix a dead loop in async_synchronize

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Message-ID: <1341797610.2439.3.camel@ThinkPad-T420>
Date:	Mon, 09 Jul 2012 09:33:30 +0800
From:	Li Zhong <zhong@...ux.vnet.ibm.com>
To:	Cong Wang <xiyou.wangcong@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, arjan@...ux.intel.com,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH] Fix a dead loop in async_synchronize_full()

On Fri, 2012-07-06 at 17:12 +0800, Cong Wang wrote:
> On Mon, Jul 2, 2012 at 2:04 PM, Li Zhong <zhong@...ux.vnet.ibm.com> wrote:
> >  void async_synchronize_full(void)
> >  {
> > -       do {
> > -               async_synchronize_cookie(next_cookie);
> > -       } while (!list_empty(&async_running) || !list_empty(&async_pending));
> > +       async_synchronize_cookie_domain(next_cookie, NULL);
> >  }
> 
> A nitpick:
> 
>  async_synchronize_cookie_domain(next_cookie, NULL);
> 
> equals to
> 
>  async_synchronize_full_domain(NULL)
> 

Why do we need one more level in the function calling stack? 

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