linux-kernel - Re: lockdep warning: threadirqs and preemptoff tracer

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Message-ID: <20150526090408.73eb8499@gandalf.local.home>
Date:	Tue, 26 May 2015 09:04:08 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Daniel Wagner <daniel.wagner@...-carit.de>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: lockdep warning: threadirqs and preemptoff tracer

On Tue, 26 May 2015 14:51:28 +0200
Daniel Wagner <daniel.wagner@...-carit.de> wrote:


> > Don't you want to modify __local_bh_enable_ip()?
> 
> __do_softirq() calls __local_bh_disable_ip() and __local_bh_enable() and
> not __local_bh_enable_ip(). I have no clue why this is done this way.
> Need to look into the history.

Yeah, that probably needs to be fixed. Find out why we call *_ip() and
it would make more sense to make that symmetric, as it may break
something else otherwise.

-- Steve
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