linux-kernel - Re: [PATCH v2 -mm 2/9] netconsole: Remove bogus check

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Date:	Fri, 13 Jul 2007 22:41:09 +0900
From:	KII Keiichi <k-keiichi@...jp.nec.com>
To:	Satyam Sharma <ssatyam@....iitk.ac.in>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Matt Mackall <mpm@...enic.com>,
	Netdev <netdev@...r.kernel.org>,
	Joel Becker <joel.becker@...cle.com>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH v2 -mm 2/9] netconsole: Remove bogus check

Hi Satyam,

> From: Satyam Sharma <ssatyam@....iitk.ac.in>
> 
> [2/9] netconsole: Remove bogus check
> 
> The (!np.dev) check in write_msg() is bogus (always false), because:
> np.dev is set by netpoll_setup(), which is called by the target init
> code in init_netconsole() _before_ register_console() => write_msg() cannot
> be triggered unless netpoll_setup() returns with success. And that will not
> happen if netpoll_setup() failed to set np.dev. Also np.dev cannot go from
> under us while netconsole is loaded. This is because netpoll_setup() grabs
> a reference for us on that dev. So let's remove the pointless check.
> 
> Signed-off-by: Satyam Sharma <ssatyam@....iitk.ac.in>
> Cc: Keiichi Kii <k-keiichi@...jp.nec.com>
> 
Acked-by: Keiichi Kii <k-keiichi@...jp.nec.com>

Thanks
-- 
Keiichi KII
NEC Corporation OSS Platform Development Division
E-mail: k-keiichi@...jp.nec.com 
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