linux-kernel - arm32 build failure after abe882a39a9c ("drm/amd/display: fix issue with eDP not detected on driver load")

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Date:   Mon, 17 Jun 2019 18:11:24 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Anthony Koo <Anthony.Koo@....com>,
        Alex Deucher <alexander.deucher@....com>
Cc:     Jun Lei <Jun.Lei@....com>,
        Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>,
        Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>,
        Christian König <christian.koenig@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: arm32 build failure after abe882a39a9c ("drm/amd/display: fix issue
 with eDP not detected on driver load")

Hi all,

After commit abe882a39a9c ("drm/amd/display: fix issue with eDP not
detected on driver load") in -next, arm32 allyesconfig builds start
failing at link time:

arm-linux-gnueabi-ld: drivers/gpu/drm/amd/display/dc/core/dc_link.o: in
function `dc_link_detect':
dc_link.c:(.text+0x260c): undefined reference to `__bad_udelay'

arm32 only allows a udelay value of up to 2000, see
arch/arm/include/asm/delay.h for more info.

Please look into this when you have a chance!
Nathan