linux-kernel - Re: Re: [PATCH] Breaks the redundant loop in kernel/marker.c

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Date:	Mon, 20 Oct 2008 09:25:20 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Zhaolei <zhaolei@...fujitsu.com>
Cc:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Re: [PATCH] Breaks the redundant loop in kernel/marker.c


* Zhaolei <zhaolei@...fujitsu.com> wrote:

> Ingo Molnar wrote:
> > hm, could you describe the necessity of this patch some more? This has 
> > the change to change behavior, which might even be a bugfix: is there 
> > any chance that the closure-loop in the e->ptype != NULL branch does not 
> > exit? Before your patch we'd continue the iteration - which _probably_ 
> > does not lead to any more matches (e->name is supposed to be unique).
> 
> Because e->name is unique in list, we don't need to continue the iteration
> after matched.
> This is a cleanup.

ok - it's useful to point this out in the changelog. You can use the 
"Impact:" header we started using recently:

    Impact: cleanup, no functionality changed

See for example this upstream commit:

| commit 07454bfff151d2465ada809bbaddf3548cc1097c
| Author: Thomas Gleixner <tglx@...utronix.de>
| Date:   Sat Oct 4 10:51:07 2008 +0200
|
|     clockevents: check broadcast tick device not the clock events device
|
|     Impact: jiffies increment too fast.
 
Mathieu, any objections against the patch?

	Ingo
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