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

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Message-ID: <20070710090524.GK11115@waste.org>
Date:	Tue, 10 Jul 2007 04:05:24 -0500
From:	Matt Mackall <mpm@...enic.com>
To:	Satyam Sharma <ssatyam@....iitk.ac.in>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Keiichi Kii <k-keiichi@...jp.nec.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

On Tue, Jul 10, 2007 at 02:49:30PM +0530, Satyam Sharma wrote:
> 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: Matt Mackall <mpm@...enic.com>

-- 
Mathematics is the supreme nostalgia of our time.
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