linux-kernel - Re: [PATCH] Relay CPU Hotplug support

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Message-ID: <20061222164243.GA86@tv-sign.ru>
Date:	Fri, 22 Dec 2006 19:42:43 +0300
From:	Oleg Nesterov <oleg@...sign.ru>
To:	Andrew Morton <akpm@...l.org>
Cc:	ego@...ibm.com, Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	linux-kernel@...r.kernel.org, David Wilder <dwilder@...ibm.com>,
	Tom Zanussi <zanussi@...ibm.com>,
	Ingo Molnar <mingo@...hat.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Christoph Hellwig <hch@...radead.org>, ltt-dev@...fik.org,
	systemtap@...rces.redhat.com,
	Douglas Niehaus <niehaus@...s.ku.edu>,
	"Martin J. Bligh" <mbligh@...igh.org>,
	Thomas Gleixner <tglx@...utronix.de>, kiran@...lex86.org,
	venkatesh.pallipadi@...el.com, dipankar@...ibm.com,
	vatsa@...ibm.com, torvalds@...l.org, davej@...hat.com
Subject: Re: [PATCH] Relay CPU Hotplug support

On 12/22, Oleg Nesterov wrote:
>
> 	void flush_work(struct workqueue_struct *wq, struct work_struct *work)
> 	{
> 		struct cpu_workqueue_struct *cwq;
> 
> 		cwq = get_wq_data(work);
> 		if (!cwq)
> 			return;
> 
> 		spin_lock_irq(&cwq->lock);
> 		list_del_init(&work->entry);
> 		work_release(work);
> 		spin_unlock_irq(&cwq->lock);

Err, forgot to mention, this should be done under workqueue_mutex
or we should re-check cwq == get_wq_data(), I didn't decide yet.

Sorry for extra noise.

Oleg.

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