On 7/24/20 7:01 PM, Stefano Stabellini wrote:

Yes, it does, thank you. I'd rather not introduce unknown regressions so
I would recommend to add an arch-specific check on registering
freeze/thaw/restore handlers. Maybe something like the following:

#ifdef CONFIG_X86
    .freeze = blkfront_freeze,
    .thaw = blkfront_restore,
    .restore = blkfront_restore
#endif


maybe Boris has a better suggestion on how to do it

An alternative might be to still install pm notifier in
drivers/xen/manage.c (I think as result of latest discussions we decided
we won't need it) and return -ENOTSUPP for ARM for
PM_HIBERNATION_PREPARE and friends. Would that work?


-boris