> Please consider the scenario when many cpus are calling
> ia64_global_tlb_purge at the same time without any lock.
> Using global variables to indicate tlb flush start and end is not safe
> here.
Isn't everything protected by the
spin_lock(&ptcg_lock);
...
spin_unlock(&ptcg_lock);
in ia64_global_tlb_purge()? Though the comment that this lock
is required for HW serialization would need to be updated to
note that the s/w implementation also requires this serialization.
-Tony
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