linux-kernel - RE: [PATCH 1/1] dmaengine: imx-sdma: remove __init annotation on sdma_event

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Date:	Wed, 11 Nov 2015 10:06:48 +0000
From:	Liu Jason <Hui.Liu@...escale.com>
To:	Arnd Bergmann <arnd@...db.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
CC:	"dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
	"vinod.koul@...el.com" <vinod.koul@...el.com>,
	"dan.j.williams@...el.com" <dan.j.williams@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/1] dmaengine: imx-sdma: remove __init annotation on
 sdma_event_remap

> -----Original Message-----
> From: Arnd Bergmann [mailto:arnd@...db.de]
> Sent: Wednesday, November 11, 2015 6:02 PM
> To: linux-arm-kernel@...ts.infradead.org
> Cc: Liu Hui-R64343; dmaengine@...r.kernel.org; vinod.koul@...el.com;
> dan.j.williams@...el.com; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH 1/1] dmaengine: imx-sdma: remove __init annotation on
> sdma_event_remap
> 
> On Wednesday 11 November 2015 17:20:49 Jason Liu wrote:
> > The sdma_probe function will call sdma_event_remap, but
> > sdma_event_remap marked with the __init annotation which make the
> > kbuild complains as the following log:
> >
> > WARNING: drivers/dma/built-in.o(.text+0x56fc): Section mismatch in
> > reference from the function sdma_probe() to the function
> > .init.text:sdma_event_remap() The function sdma_probe() references the
> > function __init sdma_event_remap().
> > This is often because sdma_probe lacks a __init annotation or the
> > annotation of sdma_event_remap is wrong.
> >
> > Remove the __init annotation on sdma_event_remap to kill this build
> > warning
> >
> > Signed-off-by: Jason Liu <r64343@...escale.com>
> > Cc: Vinod Koul <vinod.koul@...el.com>
> > Cc: Dan Williams <dan.j.williams@...el.com>
> >
> 
> Looks good. I wonder why I have not caught this with the randconfig
> builds yet.
> 
> Acked-by: Arnd Bergmann <arnd@...db.de>
> 
> One hint for the future: in the patch description, write less about the
> kbuild warning and more about the actual impact of the bug (calling a
> discarded function if the device gets unbound and rebound later, or if we
> get deferred probing).

Yes, that is true indeed. Thanks Arnd.

> 
> 	Arnd
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