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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Sat, 28 May 2022 10:40:59 -0700
Message-ID: <CAHk-=wjuyHE=1wLgHncub8FfgeyYqfWYsy4-YrhAvq9991h_Aw@mail.gmail.com>
Subject: Re: mainline build failure due to f1e4c916f97f ("drm/edid: add EDID
 block count and size helpers")
To:     Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc:     Jani Nikula <jani.nikula@intel.com>,
        =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= <ville.syrjala@linux.intel.com>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <mripard@kernel.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Sat, May 28, 2022 at 5:13 AM Sudip Mukherjee
<sudipm.mukherjee@gmail.com> wrote:
>
> just tried this with
> make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- drivers/gpu/drm/drm_edid.s
>
> size_of_edid:
>         mov     r0, #144        @,
>         ldmfd   sp, {fp, sp, pc}        @

So digging a bit deeper - since I have am arm compiler after all - I
note that 'sizeof(detailed_timings)' is 88.

Which is completely wrong. It should be 72 bytes (an array of 4
structures, each 18 bytes in size).

I have not dug deeper, but that is clearly the issue.

Now, why that only happens on that spear3xx_defconfig, I have no idea.

             Linus