Re: [RFC PATCH] x86 / hibernate: Eliminate the redundant smp_ops.play_dead assignment

[Wentao Guan]

Hello,

Thanks for your reply.

In my opinion, the only logic different before the patch is delete smp_ops.play_dead
save and restore, as the comment "the resumed kernel will decide itself" and same 
logic as which in arch/arm64/kernel/hibernate.c, the ok path will work as expect.

When discussing the error path and ret value that we not restore play_dead,
I will try to analyze the difference between native_play_dead and resume_play_dead,
and sev_es_play_dead [the all possiable three value], and I see some mwait and hlt
way difference.[maybe it happens as disable the cpu failed and goes to Enable_cpus
path in func:resume_target_kernel in hibernate.c? ] Is that it desgin to do and we can
move it to a common place in hibernate.c and left some comments ? 

BRs
Wentao Guan