linux-kernel - Re: [PATCH] ARM: debug-ll: fix BCM63xx entry for multiplatform

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Date:	Mon, 18 Jan 2016 11:42:05 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Florian Fainelli <f.fainelli@...il.com>, arm@...nel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: debug-ll: fix BCM63xx entry for multiplatform

On Monday 18 January 2016 09:59:19 Russell King - ARM Linux wrote:
> On Mon, Jan 18, 2016 at 10:51:00AM +0100, Arnd Bergmann wrote:
> > During my randconfig build testing, I found that a kernel with
> > DEBUG_AT91_UART and ARCH_BCM_63XX fails to build:
> > 
> > arch/arm/include/debug/at91.S:18:0: error: "CONFIG_DEBUG_UART_VIRT" redefined [-Werror]
> 
> Why do we have files defining CONFIG_* symbols?  This is the real error
> here - no source file should be defining this.

I agree that we should change that too, I'll send a patch for it as well.

However, this just let me stumble on the problem, without AT91 getting this
wrong, I would not have noticed that bcm63xx breaks other platforms.
The AT91 thing is just confusing but otherwise harmless, and I wouldn't
mark that fix for stable.

	Arnd