linux-kernel - Re: [SCSI] tcm_fc: Adding FC_FC4 provider (tcm_fc) for FCoE target (TCM

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Date:	Wed, 8 Jun 2011 22:10:14 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Joe Eykholt <jeykholt@...co.com>,
	Kiran Patil <kiran.patil@...el.com>,
	Nicholas Bellinger <nab@...ux-iscsi.org>,
	"James E.J. Bottomley" <JBottomley@...allels.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	scsi <linux-scsi@...r.kernel.org>
Subject: Re: [SCSI] tcm_fc: Adding FC_FC4 provider (tcm_fc) for FCoE target
 (TCM - target core) support

>    [SCSI] tcm_fc: Adding FC_FC4 provider (tcm_fc) for FCoE target (TCM - target core) support
>
>    This is a comprehensive patch for FC-FC4 provider. tcm_fc is a FC-FC4
>    provider which glues target core (TCM) with Fiber channel library
>    (libfc). tcm_fc uses existing FC4 provider hooks from Fiber channel
>    library. This Fiber channel library is used by FCoE (transport - FC
>    over Ethernet) protocol driver as well.

> --- /dev/null
> +++ b/drivers/target/tcm_fc/tfc_conf.c

> +static int __init ft_init(void)
> +{
> +       if (ft_register_configfs())
> +               return -1;
> +       if (fc_fc4_register_provider(FC_TYPE_FCP, &ft_prov)) {
> +               ft_deregister_configfs();
> +               return -1;
> +       }
> +       blocking_notifier_chain_register(&fc_lport_notifier_head, &ft_notifier);
> +       fc_lport_iterate(ft_lport_add, NULL);
> +       return 0;
> +}
> +
> +static void __exit ft_exit(void)
> +{
> +       blocking_notifier_chain_unregister(&fc_lport_notifier_head,
> +                                          &ft_notifier);
> +       fc_fc4_deregister_provider(FC_TYPE_FCP, &ft_prov);
> +       fc_lport_iterate(ft_lport_del, NULL);
> +       ft_deregister_configfs();
> +       synchronize_rcu();
> +}
> +
> +#ifdef MODULE
> +MODULE_DESCRIPTION("FC TCM fabric driver " FT_VERSION);
> +MODULE_LICENSE("GPL");
> +module_init(ft_init);
> +module_exit(ft_exit);
> +#endif /* MODULE */

If CONFIG_TCM_FC=y, this gives:

| drivers/target/tcm_fc/tfc_conf.c:642: warning: ‘ft_init’ defined but not used

Shouldn't the #ifdef MODULE and #endif just be removed?

Who else initializes this module if it's builtin?
E.g. ft_register_configfs() is global, but not used outside this source file?

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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