linux-kernel - Re: [PATCH] preempt/hardirq.h: Clarify PREEMPT

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Date:	Tue, 14 Aug 2012 12:18:49 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
cc:	Steven Rostedt <rostedt@...dmis.org>, mingo@...nel.org,
	paulmck@...ux.vnet.ibm.com, josh@...htriplett.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] preempt/hardirq.h: Clarify PREEMPT_ACTIVE bit location

On Tue, 14 Aug 2012, Srivatsa S. Bhat wrote:

> 
> By default, the PREEMPT_ACTIVE flag is bit 27, but different
> architectures can override that. Update the comment to reflect
> this fact.

Is there any sensible reason why architectures need to override that?
I can't find one.

If there is none, then we should just remove all the overrides from
the arch code instead. If there is a reason, then it should be
documented.

Thanks,

	tglx
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