linux-kernel - Re: [PATCH] lib/vsprintf: add %pT format specifier

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Message-Id: <20140110160430.526efb3ea91783fe8a32fec5@linux-foundation.org>
Date:	Fri, 10 Jan 2014 16:04:30 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Cc:	pavel@....cz, joe@...ches.com, keescook@...omium.org,
	geert@...ux-m68k.org, jkosina@...e.cz, viro@...iv.linux.org.uk,
	davem@...emloft.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] lib/vsprintf: add %pT format specifier

On Thu, 9 Jan 2014 21:52:00 +0900 Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp> wrote:

> This patch introduces %pT format specifier for printing task_struct->comm.
> Currently %pT does not provide consistency. I'm planning to change to use RCU
> in the future. By using RCU, the comm name read from task_struct->comm will be
> guaranteed to be consistent. But before modifying set_task_comm() to use RCU,
> we need to kill direct ->comm users who do not use get_task_comm().

On reflection...

It isn't obvious that this patch is sufficiently beneficial until we
have that RCU code in place.

So I could retain this patch in -mm until we have that all sorted out. 
And I'll have to avoid merging %pT users into mainline in the
meanwhile!

Am I wrong?  The patch seems fairly pointless as a standalone thing?
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