linux-kernel - Re: [PATCH 2/2] drm/amd/display: Don't build DCN1 when kcov is enabled

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Date:   Thu, 16 Aug 2018 23:05:51 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     sunpeng.li@....com
Cc:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        michel.daenzer@....com,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        amd-gfx@...ts.freedesktop.org, David Airlie <airlied@...ux.ie>,
        Jordan Lazare <Jordan.Lazare@....com>,
        Harry Wentland <harry.wentland@....com>
Subject: Re: [PATCH 2/2] drm/amd/display: Don't build DCN1 when kcov is enabled

On Thu, Aug 16, 2018 at 9:45 PM <sunpeng.li@....com> wrote:
>
> From: "Leo (Sunpeng) Li" <sunpeng.li@....com>
>
> DCN1 contains code that utilizes fp math. When
> CONFIG_KCOV_INSTRUMENT_ALL and CONFIG_KCOV_ENABLE_COMPARISONS are
> enabled, build errors are found. See this earlier patch for details:
>
> https://lists.freedesktop.org/archives/dri-devel/2018-August/186131.html
>
> As a short term solution, disable CONFIG_DRM_AMD_DC_DCN1_0 when
> KCOV_INSTRUMENT_ALL and KCOV_ENABLE_COMPARISONS are enabled. In
> addition, make it a fully derived config, taking into account
> CONFIG_X86.
>
> Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@....com>

Looks good to me,

Acked-by: Arnd Bergmann <arnd@...db.de>