linux-kernel - Re: [PATCH v4 1/2] lib: devres: add a helper function for ioremap

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Date:   Mon, 14 Oct 2019 13:15:53 -0600
From:   Tuowen Zhao <ztuowen@...il.com>
To:     lee.jones@...aro.org, linux-kernel@...r.kernel.org,
        AceLan Kao <acelan.kao@...onical.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Luis Chamberlain <mcgrof@...nel.org>
Subject: Re: [PATCH v4 1/2] lib: devres: add a helper function for ioremap_uc

On Tue, 2019-10-15 at 02:46 +0800, kbuild test robot wrote:
> -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         GCC_VERSION=7.4.0 make.cross ARCH=sparc64 

Oops, I'm not sure how would we best fix this. Clearly the patch is not
intended for sparc64. Maybe adding devm_ioremap_uc is rather not safe
right now.

Although, We could declare dummies for these architectures like it has
been for powerpc.

I just noticed another driver having this issue, and fixed with direct
calls to ioremap_uc().

3cc2dac5be3f2: drivers/video/fbdev/atyfb: Replace MTRR UC hole with
strong UC

Tuowen