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From: Joel Fernandes <joel@joelfernandes.org>
To: Tejun Heo <tj@kernel.org>
Cc: linux-kernel@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jonathan Corbet <corbet@lwn.net>,
	Josh Triplett <josh@joshtriplett.org>,
	Lai Jiangshan <jiangshanlai@gmail.com>,
	linux-doc@vger.kernel.org,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	"Paul E. McKenney" <paulmck@linux.ibm.com>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	rcu@vger.kernel.org, Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH 1/3] workqueue: Convert for_each_wq to use built-in list check (v2)
Date: Wed, 14 Aug 2019 18:42:05 -0400	[thread overview]
Message-ID: <20190814224205.GC69375@google.com> (raw)
In-Reply-To: <20190814194841.GA588936@devbig004.ftw2.facebook.com>

On Wed, Aug 14, 2019 at 12:48:41PM -0700, Tejun Heo wrote:
> Hello, Joel.
> 
> On Sun, Aug 11, 2019 at 06:11:09PM -0400, Joel Fernandes (Google) wrote:
> > list_for_each_entry_rcu now has support to check for RCU reader sections
> > as well as lock. Just use the support in it, instead of explicitly
> > checking in the caller.
> > 
> > Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
> 
> Acked-by: Tejun Heo <tj@kernel.org>

Thanks.

> >  #define for_each_pwq(pwq, wq)						\
> > -	list_for_each_entry_rcu((pwq), &(wq)->pwqs, pwqs_node)		\
> > -		if (({ assert_rcu_or_wq_mutex(wq); false; })) { }	\
> > -		else
> > +	list_for_each_entry_rcu((pwq), &(wq)->pwqs, pwqs_node,		\
> > +				 lock_is_held(&(wq->mutex).dep_map))
> 
> Why not lockdep_is_held() tho?

Yes, that's better.

thanks,

 - Joel


      reply	other threads:[~2019-08-14 22:42 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-11 22:11 [PATCH 1/3] workqueue: Convert for_each_wq to use built-in list check (v2) Joel Fernandes (Google)
2019-08-11 22:11 ` [PATCH 2/3] doc: Update documentation about list_for_each_entry_rcu (v1) Joel Fernandes (Google)
2019-08-12 20:22   ` Paul E. McKenney
2019-08-12 20:42     ` Joel Fernandes
2019-08-12 21:24       ` Paul E. McKenney
2019-08-11 22:11 ` [PATCH 3/3] driver/core: Fix build error when SRCU and lockdep disabled Joel Fernandes (Google)
2019-08-12  5:02   ` Greg Kroah-Hartman
2019-08-12 13:03     ` Joel Fernandes
2019-08-12 18:11       ` Steven Rostedt
2019-08-12 20:01         ` Joel Fernandes
2019-08-12 20:05           ` Steven Rostedt
2019-08-11 22:12 ` [PATCH 1/3] workqueue: Convert for_each_wq to use built-in list check (v2) Joel Fernandes
2019-08-14 19:48 ` Tejun Heo
2019-08-14 22:42   ` Joel Fernandes [this message]

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