Change in coreboot[master]: cpu/x86/mp_init.c: Add wait_finished_mp_run_on_all_cpus

[Kane Chen (Code Review)]

Attention is currently required from: Arthur Heymans, Tim Wawrzynczak, Kane Chen.
Kane Chen has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63553 )

Change subject: cpu/x86/mp_init.c: Add wait_finished_mp_run_on_all_cpus
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Patch Set 3:

(1 comment)

Patchset:

PS3: 
i tried this patch and the race condition is gone.

I also base on Arthur's patch to create another solution. not sure if you like it.
see https://review.coreboot.org/c/coreboot/+/63566

basically it adds a parameter wait_ap_complete in mp_callback and it can decide AP calls store_callback before or after lcb.func(lcb.arg)