linux-kernel - Re: [PATCH 3/3] checkpatch.pl: Add check for current->comm references

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Date:	Fri, 13 May 2011 20:13:53 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	John Stultz <john.stultz@...aro.org>
CC:	LKML <linux-kernel@...r.kernel.org>, Ted Ts'o <tytso@....edu>,
	David Rientjes <rientjes@...gle.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org
Subject: Re: [PATCH 3/3] checkpatch.pl: Add check for current->comm references

>   scripts/checkpatch.pl |    4 ++++
>   1 files changed, 4 insertions(+), 0 deletions(-)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index d867081..9d2eab5 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -2868,6 +2868,10 @@ sub process {
>   			WARN("usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr);
>   		}
> 
> +# check for current->comm usage
> +		if ($line =~ /current->comm/) {
> +			WARN("comm access needs to be protected. Use get_task_comm, or printk's \%ptc formatting.\n" . $herecurr);

I think we should convert all of task->comm usage. not only current. At least, you plan to remove task_lock() from
%ptc patch later.

thanks.



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