linux-kernel - Re: [PATCH 2/2] drm/msm: gpu: call qcom_mdt interfaces only for ARCH

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Date:   Wed, 28 Jun 2017 22:11:50 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Rob Clark <robdclark@...il.com>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        David Airlie <airlied@...ux.ie>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Archit Taneja <architt@...eaurora.org>,
        Eric Anholt <eric@...olt.net>,
        Sushmita Susheelendra <ssusheel@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] drm/msm: gpu: call qcom_mdt interfaces only for
 ARCH_QCOM

On Tue 20 Jun 13:16 PDT 2017, Arnd Bergmann wrote:

> When compile-testing for something other than ARCH_QCOM,
> we run into a link error:
> 
> drivers/gpu/drm/msm/adreno/a5xx_gpu.o: In function `a5xx_hw_init':
> a5xx_gpu.c:(.text.a5xx_hw_init+0x600): undefined reference to `qcom_mdt_get_size'
> a5xx_gpu.c:(.text.a5xx_hw_init+0x93c): undefined reference to `qcom_mdt_load'
> 
> There is already an #ifdef that tries to check for CONFIG_QCOM_MDT_LOADER,
> but that symbol is only meaningful when building for ARCH_QCOM.
> 
> This adds a compile-time check for ARCH_QCOM, and clarifies the
> Kconfig select statement so we don't even try it for other targets.
> 
> The check for CONFIG_QCOM_MDT_LOADER can then go away, which also
> improves compile-time coverage and makes the code a little nicer
> to read.

Acked-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Regards,
Bjorn