netdev - Re: [PATCH 2/2] ehea: add memory remove hotplug support

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Message-Id: <1202136362.7672.5.camel@concordia>
Date:	Tue, 05 Feb 2008 01:46:02 +1100
From:	Michael Ellerman <michael@...erman.id.au>
To:	Jan-Bernd Themann <ossthema@...ibm.com>
Cc:	Jeff Garzik <jeff@...zik.org>, Thomas Klein <tklein@...ibm.com>,
	Jan-Bernd Themann <themann@...ibm.com>,
	netdev <netdev@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ppc <linuxppc-dev@...abs.org>,
	Christoph Raisch <raisch@...ibm.com>,
	Marcus Eder <meder@...ibm.com>
Subject: Re: [PATCH 2/2] ehea: add memory remove hotplug support

On Mon, 2008-02-04 at 14:04 +0100, Jan-Bernd Themann wrote:
> Add memory remove hotplug support
> 
> Signed-off-by: Jan-Bernd Themann <themann@...ibm.com>
> 
> ---
>  Comment: This patch depends on the following patch that
>  exports the symbols
>   register_memory_notifier()
>   unregister_memory_notifier()
> 
>  http://lkml.org/lkml/2008/2/1/293
> 
> 
>  drivers/net/ehea/ehea_main.c |   25 +++++++++++++++++++++++++
>  1 files changed, 25 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
> index 21af674..b75afcc 100644
> --- a/drivers/net/ehea/ehea_main.c
> +++ b/drivers/net/ehea/ehea_main.c

> @@ -3559,6 +3578,10 @@ int __init ehea_module_init(void)
>  	if (ret)
>  		ehea_info("failed registering reboot notifier");
>  
> +	ret = register_memory_notifier(&ehea_mem_nb);
> +	if (ret)
> +		ehea_info("failed registering memory remove notifier");
> 
>  	ret = crash_shutdown_register(&ehea_crash_handler);
>  	if (ret)
>  		ehea_info("failed registering crash handler");

You don't do anything except print a message if the registration fails.
What happens when someone tries to remove memory but the memory notifier
wasn't registered properly? Bang?

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person

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