linux-kernel - Re: [PATCH] RDMA/ocrdma: Fix build with IPV6=n

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Date:	Wed, 02 May 2012 17:29:17 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Roland Dreier <roland@...nel.org>
CC:	linux-rdma@...r.kernel.org, linux-next@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] RDMA/ocrdma: Fix build with IPV6=n

On 05/02/12 15:51, Roland Dreier wrote:

> From: Roland Dreier <roland@...estorage.com>
> 
> When IPV6 is not enabled:
> 
>     ERROR: "register_inet6addr_notifier" [drivers/infiniband/hw/ocrdma/ocrdma.ko] undefined!
>     ERROR: "unregister_inet6addr_notifier" [drivers/infiniband/hw/ocrdma/ocrdma.ko] undefined!
> 
> Fix this by wrapping the inet6 calls in #ifdef IPV6.  Also make the
> ocrdma module depend on (IPV6 || IPV6=n) to forbid the case of modular
> ipv6 but built-in ocrdma (which can't work, because ocrdma calls ipv6
> functions).
> 
> Reported-by: Randy Dunlap <rdunlap@...otime.net>
> Signed-off-by: Roland Dreier <roland@...estorage.com>


Acked-by: Randy Dunlap <rdunlap@...otime.net>

Thanks.

> ---
> OK, added this to my tree, should fix this.
> 
> Thanks,
>   Roland
> 
>  drivers/infiniband/hw/ocrdma/Kconfig       |    2 +-
>  drivers/infiniband/hw/ocrdma/ocrdma_main.c |   29 ++++++++++++++++++++--------
>  2 files changed, 22 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/infiniband/hw/ocrdma/Kconfig b/drivers/infiniband/hw/ocrdma/Kconfig
> index cf99342..b5b6056 100644
> --- a/drivers/infiniband/hw/ocrdma/Kconfig
> +++ b/drivers/infiniband/hw/ocrdma/Kconfig
> @@ -1,6 +1,6 @@
>  config INFINIBAND_OCRDMA
>  	tristate "Emulex One Connect HCA support"
> -	depends on ETHERNET && NETDEVICES && PCI
> +	depends on ETHERNET && NETDEVICES && PCI && (IPV6 || IPV6=n)
>  	select NET_VENDOR_EMULEX
>  	select BE2NET
>  	---help---
> diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_main.c b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
> index 0bc1efb..a20d16e 100644
> --- a/drivers/infiniband/hw/ocrdma/ocrdma_main.c
> +++ b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
> @@ -51,12 +51,6 @@ static DEFINE_SPINLOCK(ocrdma_devlist_lock);
>  static DEFINE_IDR(ocrdma_dev_id);
>  
>  static union ib_gid ocrdma_zero_sgid;
> -static int ocrdma_inet6addr_event(struct notifier_block *,
> -				  unsigned long, void *);
> -
> -static struct notifier_block ocrdma_inet6addr_notifier = {
> -	.notifier_call = ocrdma_inet6addr_event
> -};
>  
>  static int ocrdma_get_instance(void)
>  {
> @@ -204,6 +198,8 @@ static int ocrdma_build_sgid_tbl(struct ocrdma_dev *dev)
>  	return 0;
>  }
>  
> +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
> +
>  static int ocrdma_inet6addr_event(struct notifier_block *notifier,
>  				  unsigned long event, void *ptr)
>  {
> @@ -259,6 +255,12 @@ static int ocrdma_inet6addr_event(struct notifier_block *notifier,
>  	return NOTIFY_OK;
>  }
>  
> +static struct notifier_block ocrdma_inet6addr_notifier = {
> +	.notifier_call = ocrdma_inet6addr_event
> +};
> +
> +#endif /* IPV6 */
> +
>  static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
>  					      u8 port_num)
>  {
> @@ -541,23 +543,34 @@ static struct ocrdma_driver ocrdma_drv = {
>  	.state_change_handler	= ocrdma_event_handler,
>  };
>  
> +static void ocrdma_unregister_inet6addr_notifier(void)
> +{
> +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
> +	unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
> +#endif
> +}
> +
>  static int __init ocrdma_init_module(void)
>  {
>  	int status;
>  
> +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
>  	status = register_inet6addr_notifier(&ocrdma_inet6addr_notifier);
>  	if (status)
>  		return status;
> +#endif
> +
>  	status = be_roce_register_driver(&ocrdma_drv);
>  	if (status)
> -		unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
> +		ocrdma_unregister_inet6addr_notifier();
> +
>  	return status;
>  }
>  
>  static void __exit ocrdma_exit_module(void)
>  {
>  	be_roce_unregister_driver(&ocrdma_drv);
> -	unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
> +	ocrdma_unregister_inet6addr_notifier();
>  }
>  
>  module_init(ocrdma_init_module);



-- 
~Randy
--
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