linux-kernel - Re: mainline build failure due to f1e4c916f97f ("drm/edid: add EDID block count and size helpers")

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Date:   Sat, 28 May 2022 10:40:59 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:     Jani Nikula <jani.nikula@...el.com>,
        Ville Syrjälä <ville.syrjala@...ux.intel.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: mainline build failure due to f1e4c916f97f ("drm/edid: add EDID
 block count and size helpers")

On Sat, May 28, 2022 at 5:13 AM Sudip Mukherjee
<sudipm.mukherjee@...il.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