linux-kernel - Re: [PATCH 1/4] printk: Re-add irqsave/restore in printk

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Message-ID: <20140504161312.GL17778@laptop.programming.kicks-ass.net>
Date:	Sun, 4 May 2014 18:13:12 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jan Kara <jack@...e.cz>
Cc:	John Stultz <john.stultz@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>, Jiri Bohac <jbohac@...e.cz>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH 1/4] printk: Re-add irqsave/restore in printk_sched

On Sun, May 04, 2014 at 04:58:47PM +0200, Jan Kara wrote:
> On Fri 02-05-14 15:09:15, John Stultz wrote:
> > A commit in akpm's tree (printk: remove separate printk_sched
> > buffers...), removed the printk_sched irqsave/restore lines
> > since it was safe for current users. Since we may be expanding
> > usage of printk_sched(), re-add the irqsave/restore logic
> > to make the functionality more generally safe.
>   So I'm just wondering: Do you have anything particular for which you need
> interrupts disabled? Won't e.g. disabling preemption be enough?

Yeah, I think preemption disabled is sufficient.
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