linux-kernel - Re: checkpatch and kernel/sched.c

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Message-ID: <4700A649.9020700@qumranet.com>
Date:	Mon, 01 Oct 2007 09:48:25 +0200
From:	Avi Kivity <avi@...ranet.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Ingo Molnar <mingo@...e.hu>, Andy Whitcroft <apw@...dowen.org>,
	linux-kernel@...r.kernel.org
Subject: Re: checkpatch and kernel/sched.c

Andrew Morton wrote:
>> this is actually a false positive - as the debug code constructs a 
>> printk output _without_ \n. So the script should check whether there's 
>> any \n in the printk string - if there is none, do not emit a warning. 
>> (if you implement that then i think it can remain a warning and does not 
>> need to move to CHECK.)
>>     
>
> Yeah, it does that sometimes.  I don't think it's fixable within the scope
> of checkpatch.  It needs to check whether some preceding printk which might
> not even be in the patch has a \n:
>
> 	printk(KERN_ERR "foo");
> 	<100 lines of whatever>
> +	printk("bar\n");
>
> we're screwed...
>
>   

Isn't that broken on SMP (or with preemption) anyway?

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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