linux-kernel - Re: [PATCH 1/2] char: PC rtc: replace blacklist with whitelist

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Message-ID: <20160302100300.GL23985@piout.net>
Date:	Wed, 2 Mar 2016 11:03:00 +0100
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-arm-kernel@...ts.infradead.org, rtc-linux@...glegroups.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] char: PC rtc: replace blacklist with whitelist

On 02/03/2016 at 10:48:50 +0100, Arnd Bergmann wrote :
> Every new architecture has to add itself to the growing list of those
> that do not support the legacy PC RTC driver.
> 
> This replaces the long list of architectures that don't support it
> with a shorter list of those that do.
> 
> The list is taken from those architectures that have a non-empty
> asm/mc146818rtc.h header file and were not explicitly blacklisted.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
Acked-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>

> ---
>  drivers/char/Kconfig | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
> index a043107da2af..9716bc36495a 100644
> --- a/drivers/char/Kconfig
> +++ b/drivers/char/Kconfig
> @@ -279,8 +279,7 @@ if RTC_LIB=n
>  
>  config RTC
>  	tristate "Enhanced Real Time Clock Support (legacy PC RTC driver)"
> -	depends on !PPC && !PARISC && !IA64 && !M68K && !SPARC && !FRV \
> -			&& !ARM && !SUPERH && !S390 && !AVR32 && !BLACKFIN && !UML
> +	depends on ALPHA || M32R || M68K || MIPS || MN10300 || PPC || X86
>  	---help---
>  	  If you say Y here and create a character special file /dev/rtc with
>  	  major number 10 and minor number 135 using mknod ("man mknod"), you
> -- 
> 2.7.0
> 

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com