linux-kernel - RE: [PATCH -mm] dma: INTEL

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Message-ID: <BAE9DCEF64577A439B3A37F36F9B691C02BEC331@orsmsx418.amr.corp.intel.com>
Date:	Wed, 25 Jul 2007 16:48:45 -0700
From:	"Nelson, Shannon" <shannon.nelson@...el.com>
To:	"Satyam Sharma" <ssatyam@....iitk.ac.in>,
	<akpm@...ux-foundation.org>
Cc:	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH -mm] dma: INTEL_IOATDMA build fix

Satyam Sharma [mailto:ssatyam@....iitk.ac.in] 
>
>Make CONFIG_INTEL_IOATDMA select CONFIG_DCA because it uses code
>exported from said dependency:
>
># CONFIG_DCA is not set
>CONFIG_INTEL_IOATDMA=m
>
>ERROR: "alloc_dca_provider" [drivers/dma/ioatdma.ko] undefined!
>ERROR: "register_dca_provider" [drivers/dma/ioatdma.ko] undefined!
>ERROR: "unregister_dca_provider" [drivers/dma/ioatdma.ko] undefined!
>ERROR: "free_dca_provider" [drivers/dma/ioatdma.ko] undefined!
>make[1]: *** [__modpost] Error 1
>
>"select" seems ok because CONFIG_DCA looks library-like and 
>doesn't itself
>depend upon anything else.
>
>Signed-off-by: Satyam Sharma <ssatyam@....iitk.ac.in>

Well, ioatdma should be smarter and not try to use ioat_dca.c if there
is no CONFIG_DCA.  However, until that happens, this is fine.

Signed-off-by: Shannon Nelson <shannon.nelson@...el.com>
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