linux-kernel - Re: [PATCH] PM / OPP: Implement free_opp

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Date:	Fri, 16 May 2014 22:41:49 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Inderpal Singh <inderpal.s@...sung.com>
Cc:	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Nishanth Menon <nm@...com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Pavel Machek <pavel@....cz>
Subject: Re: [PATCH] PM / OPP: Implement free_opp_table function

On 16 May 2014 22:38, Inderpal Singh <inderpal.s@...sung.com> wrote:
>>> +       while (!list_empty(&dev_opp->opp_list)) {
>>> +               opp = list_entry_rcu(dev_opp->opp_list.next,
>>> +                                       struct dev_pm_opp, node);
>>
>> list_for_each_entry_rcu ?
>>
>
> list_for_each_entry_rcu can not be used as opp is being deleted in the loop.

So what? The above code can be replaced easily I think.
This is how it is implemented:

#define list_for_each_entry_rcu(pos, head, member) \
        for (pos = list_entry_rcu((head)->next, typeof(*pos), member); \
                &pos->member != (head); \
                pos = list_entry_rcu(pos->member.next, typeof(*pos), member))
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