linux-kernel - Re: [PATCH] checkpatch: add check for the buggy while_each

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Date:	Sun, 18 Jan 2015 17:27:33 -0800
From:	Joe Perches <joe@...ches.com>
To:	Sergey Dyasly <dserrg@...il.com>
Cc:	linux-kernel@...r.kernel.org, Oleg Nesterov <oleg@...hat.com>,
	Andy Whitcroft <apw@...onical.com>
Subject: Re: [PATCH] checkpatch: add check for the buggy while_each_thread()

On Sun, 2015-01-18 at 17:24 +0300, Sergey Dyasly wrote:
> Now it's preferable to use for_each_thread() instead of while_each_thread().
> Add a check to checkpatch.pl in order to prevent any new usages of the buggy
> while_each_thread() when possible.
[]
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> @@ -3255,6 +3255,12 @@ sub process {
>  			     "Prefer dev_$level(... to dev_printk(KERN_$orig, ...\n" . $herecurr);
>  		}
>  
> +# Check for the buggy while_each_thread()
> +		if ($line =~ /\bwhile_each_thread\(/) {

	\bwhile_each_thread\s*\(
or maybe
	\bwhile_each_thread\b

> +			WARN("WHILE_EACH_THREAD",
> +			     "Prefer to use for_each_thread() instead of the buggy while_each_thread(). See commit 0c740d0afc3bff0a097ad03a1c8df92757516f5c for details.\n" . $herecurr);

Pretty long commit id, 12 is probably enough.


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