Re: [PATCH 4.19 000/323] 4.19.291-rc1 review

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On Thu, 10 Aug 2023 at 12:28, Daniel Díaz <daniel.diaz@xxxxxxxxxx> wrote:
>
> Two new warnings are introduced on x86_64 with GCC-8 (defconfig):
>
> -----8<-----
> drivers/gpu/drm/drm_edid.o: warning: objtool:
> drm_mode_std.isra.34()+0xbc: return with modified stack frame
> drivers/gpu/drm/drm_edid.o: warning: objtool:
> drm_mode_std.isra.34()+0x0: stack state mismatch: cfa1=7+112 cfa2=7+8
> ----->8-----
>
> Bisection points to the quoted commit ("drm/edid: Fix uninitialized
> variable in drm_cvt_modes()"), 991fcb77f490 upstream. Reverting makes
> the warnings disappear.

Bah. Stable should pick up commit d652d5f1eeeb ("drm/edid: fix objtool
warning in drm_cvt_modes()") from mainline too.

Sadly it didn't have a 'Fixes:' tag, so it didn't get picked up
automatically. My bad.

Although it's not like the commits it fixes were actually ever marked
for stable either. I guess commit 3f649ab728cd ("treewide: Remove
uninitialized_var() usage") got picked up as some kind of "make it
easier to apply other patches" thing.

               Linus




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