linux-kernel - Re: [RFC PATCH v1 24/40] metag: DMA

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Message-Id: <201211231647.27260.arnd@arndb.de>
Date:	Fri, 23 Nov 2012 16:47:27 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	James Hogan <james.hogan@...tec.com>
Cc:	linux-arch@...r.kernel.org,
	"linux-kernel" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH v1 24/40] metag: DMA

On Friday 23 November 2012, James Hogan wrote:
> Subject: [PATCH 1/1] asm-generic/io.h: check CONFIG_VIRT_TO_BUS
> 
> Make asm-generic/io.h check CONFIG_VIRT_TO_BUS before defining
> virt_to_bus() and bus_to_virt(), otherwise it's easy to accidentally
> have a silently failing incorrect direct mapped definition rather then
> no definition at all.
> 
> Signed-off-by: James Hogan <james.hogan@...tec.com>

Good catch!

Acked-by: Arnd Bergmann <arnd@...db.de>
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