linux-kernel - Re: [RFC: PATCH] err.h: silence warning when using IS_ERR on void _

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Date:	Thu, 13 Jun 2013 10:55:17 +0530
From:	Sachin Kamat <sachin.kamat@...aro.org>
To:	Marc Kleine-Budde <mkl@...gutronix.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, kernel@...gutronix.de,
	Thierry Reding <thierry.reding@...il.com>
Subject: Re: [RFC: PATCH] err.h: silence warning when using IS_ERR on void
 __iomem *

On 13 June 2013 03:01, Marc Kleine-Budde <mkl@...gutronix.de> wrote:
> Commit 75096579c3ac ("lib: devres: Introduce devm_ioremap_resource()")
> introduced devm_ioremap_resource() and encourage to check its return value with
> IS_ERR(). This however leads to the following sparse warnings, as
> devm_ioremap_resource() returns a void __iomem pointer:
>
> drivers/net/can/c_can/c_can_platform.c:205:32: warning: incorrect type in argument 1 (different address spaces)
> drivers/net/can/c_can/c_can_platform.c:205:32:    expected void const *ptr
> drivers/net/can/c_can/c_can_platform.c:205:32:    got unsigned int [noderef] [usertype] <asn:2>*raminit_ctrlreg

CC ing Thierry who has solved this issue some time back.

-- 
With warm regards,
Sachin
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