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Date:   Thu, 3 Dec 2020 17:41:53 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Nathan Chancellor <natechancellor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Arnd Bergmann <arnd@...db.de>, linux-watchdog@...r.kernel.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: Re: [PATCH] watchdog: coh901327: add COMMON_CLK dependency

On Thu, Dec 03, 2020 at 11:33:42PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> clang produces a build failure in configurations without COMMON_CLK
> when a timeout calculation goes wrong:
> 
> arm-linux-gnueabi-ld: drivers/watchdog/coh901327_wdt.o: in function `coh901327_enable':
> coh901327_wdt.c:(.text+0x50): undefined reference to `__bad_udelay'
> 
> Add a Kconfig dependency to only do build testing when COMMON_CLK
> is enabled.
> 
> Fixes: da2a68b3eb47 ("watchdog: Enable COMPILE_TEST where possible")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

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

> ---
>  drivers/watchdog/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
> index 8bdbd125821b..32fa6de7b820 100644
> --- a/drivers/watchdog/Kconfig
> +++ b/drivers/watchdog/Kconfig
> @@ -631,7 +631,7 @@ config SUNXI_WATCHDOG
>  
>  config COH901327_WATCHDOG
>  	bool "ST-Ericsson COH 901 327 watchdog"
> -	depends on ARCH_U300 || (ARM && COMPILE_TEST)
> +	depends on ARCH_U300 || (ARM && COMMON_CLK && COMPILE_TEST)
>  	default y if MACH_U300
>  	select WATCHDOG_CORE
>  	help
> -- 
> 2.27.0
> 

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