K 10
svn:author
V 6
luporl
K 8
svn:date
V 27
2020-09-01T11:30:39.392312Z
K 7
svn:log
V 569
[PowerPC] Move pmc_hook out of critical section

Calling pmc_hook inside a critical section may result in a panic.

This happens when the user callchain is fetched, because it uses
pmap_map_user_ptr, that tries to get the (sleepable) pmap lock when the
needed vsid is not found.

Judging by the implementation in other platforms, intr_irq_handler in
kern/subr_intr.c and what pmc_hook do, it seems safe to move pmc_hook
outside the critical section.

Sponsored by:	Eldorado Research Institute (eldorado.org.br)
Differential Revision:	https://reviews.freebsd.org/D26111

END