linux-kernel - Re: [PATCH 2/7] drivers: nubus: Avoids building driver if CONFIG

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Date:   Wed, 26 Sep 2018 16:45:28 +1000 (AEST)
From:   Finn Thain <fthain@...egraphics.com.au>
To:     Leonardo Bras <leobras.c@...il.com>
cc:     lkcamp@...ts.libreplanetbr.org,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Robert Richter <rric@...nel.org>,
        "James E.J. Bottomley" <jejb@...isc-linux.org>,
        Helge Deller <deller@....de>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-kernel@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
        oprofile-list@...ts.sf.net, linux-parisc@...r.kernel.org,
        linux-s390@...r.kernel.org
Subject: Re: [PATCH 2/7] drivers: nubus: Avoids building driver if CONFIG_NUBUS
 is disabled

On Tue, 25 Sep 2018, Leonardo Bras wrote:

> Avoids building driver if 'make drivers/nubus/' is called and
> CONFIG_NUBUS is disabled.
> Avoids building proc.o if CONFIG_PROC_FS is enabled but
> CONFIG_NUBUS is disabled.
> 
> Signed-off-by: Leonardo Bras <leobras.c@...il.com>
> ---
>  drivers/nubus/Makefile | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/nubus/Makefile b/drivers/nubus/Makefile
> index 6d063cde39d1..827301c4a84f 100644
> --- a/drivers/nubus/Makefile
> +++ b/drivers/nubus/Makefile
> @@ -2,6 +2,6 @@
>  # Makefile for the nubus specific drivers.
>  #
>  
> -obj-y := nubus.o bus.o
> -
> -obj-$(CONFIG_PROC_FS) += proc.o
> +obj-$(CONFIG_NUBUS) := nubus.o
> +nubus-y := bus.o
> +nubus-$(CONFIG_PROC_FS) += proc.o
> 

Did you build this for m68k? It doesn't link for me.

  MODPOST vmlinux.o
drivers/nubus/bus.o: In function `nubus_device_release':
bus.c:(.text+0xd0): undefined reference to `nubus_func_rsrcs'
bus.c:(.text+0xe0): undefined reference to `nubus_func_rsrcs'
bus.c:(.text+0x118): undefined reference to `nubus_func_rsrcs'
bus.c:(.text+0xc2): undefined reference to `nubus_func_rsrcs'
drivers/nubus/proc.o: In function `nubus_devices_proc_show':
proc.c:(.text+0xa): undefined reference to `nubus_first_rsrc_or_null'
proc.c:(.text+0x1c): undefined reference to `nubus_next_rsrc_or_null'
drivers/nubus/proc.o: In function `nubus_proc_rsrc_show':
proc.c:(.text+0x190): undefined reference to `nubus_seq_write_rsrc_mem'
drivers/nubus/proc.o: In function `nubus_proc_add_rsrc_mem':
proc.c:(.text+0x24c): undefined reference to `nubus_dirptr'

Patch 4/7 (drivers/zorro) also causes 'undefined reference' errors. I 
didn't test the others.

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