linux-kernel - Re: [PATCH -next] watchdog/kempld_wdt: fix build for COMPILE

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Date:   Tue, 28 Feb 2017 10:43:14 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-watchdog@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        Wim Van Sebroeck <wim@...ana.be>,
        Michael Brunner <michael.brunner@...tron.com>
Subject: Re: [PATCH -next] watchdog/kempld_wdt: fix build for COMPILE_TEST

On Tue, Feb 28, 2017 at 10:31:07AM -0800, Randy Dunlap wrote:
> From: Randy Dunlap <rdunlap@...radead.org>
> 
> Fix kconfig dependencies when COMPILE_TEST is enabled so that
> interdependent module dependencies are configured as needed.
> 
> Fixes build when MFD_KEMPLD=m and KEMPLD_WDT=y and COMPILE_TEST=y.
> The problem is in mixing tristate and boolean dependencies.
> 
> This fixes 32 build errors like these (most are omitted here):
> drivers/built-in.o: In function `kempld_wdt_stop':
> kempld_wdt.c:(.text+0x19ab8d): undefined reference to `kempld_get_mutex'
> kempld_wdt.c:(.text+0x19ab99): undefined reference to `kempld_read8'
> kempld_wdt.c:(.text+0x19abaa): undefined reference to `kempld_write8'
> kempld_wdt.c:(.text+0x19abbf): undefined reference to `kempld_release_mutex'
> drivers/built-in.o: In function `kempld_wdt_keepalive':
> kempld_wdt.c:(.text+0x19ac24): undefined reference to `kempld_release_mutex'
> drivers/built-in.o: In function `kempld_wdt_set_stage_action.isra.4':
> kempld_wdt.c:(.text+0x19aca1): undefined reference to `kempld_get_mutex'
> drivers/built-in.o: In function `kempld_wdt_set_stage_timeout.isra.5':
> kempld_wdt.c:(.text+0x19adde): undefined reference to `kempld_release_mutex'
> drivers/built-in.o: In function `kempld_wdt_start':
> kempld_wdt.c:(.text+0x19ae89): undefined reference to `kempld_get_mutex'
> drivers/built-in.o: In function `kempld_wdt_get_timeout.isra.6':
> kempld_wdt.c:(.text+0x19b01a): undefined reference to `kempld_read8'
> drivers/built-in.o: In function `kempld_wdt_update_timeouts':
> kempld_wdt.c:(.text+0x19b0c6): undefined reference to `kempld_get_mutex'
> drivers/built-in.o: In function `kempld_wdt_suspend':
> kempld_wdt.c:(.text+0x19b136): undefined reference to `kempld_release_mutex'
> drivers/built-in.o: In function `kempld_wdt_probe':
> kempld_wdt.c:(.text+0x19b1a4): undefined reference to `kempld_get_mutex'
> kempld_wdt.c:(.text+0x19b1bd): undefined reference to `kempld_release_mutex'
> 
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: Michael Brunner <michael.brunner@...tron.com>

And I thought I had that all sorted out :-(

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
>  drivers/watchdog/Kconfig |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- linux-next-20170228.orig/drivers/watchdog/Kconfig
> +++ linux-next-20170228/drivers/watchdog/Kconfig
> @@ -1063,7 +1063,7 @@ config HP_WATCHDOG
>  
>  config KEMPLD_WDT
>  	tristate "Kontron COM Watchdog Timer"
> -	depends on MFD_KEMPLD || COMPILE_TEST
> +	depends on MFD_KEMPLD || (MFD_KEMPLD=y && COMPILE_TEST)
>  	select WATCHDOG_CORE
>  	help
>  	  Support for the PLD watchdog on some Kontron ETX and COMexpress