On Thu, 10 Aug 2023 at 12:28, Daniel Díaz daniel.diaz@linaro.org 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