s390/topology: fix topology information when calling cpu hotplug notifiers

The cpu hotplug notifiers are called without updating the core/thread
masks when a new CPU is added. This causes problems with code setting
up data structures in a cpu hotplug notifier, and relying on that later
in normal code.

This caused a crash in the new core scheduling code (SCHED_CORE),
where rq->core was set up in a notifier depending on cpu masks.

To fix this, add a cpu_setup_mask which is used in update_cpu_masks()
instead of the cpu_online_mask to determine whether the cpu masks should
be set for a certain cpu. Also move update_cpu_masks() to update the
masks before calling notify_cpu_starting() so that the notifiers are
seeing the updated masks.

Signed-off-by: Sven Schnelle <[email protected]>
Cc: <[email protected]>
[[email protected]: get rid of cpu_online_mask handling]
Signed-off-by: Heiko Carstens <[email protected]>

0 files changed, 0 insertions, 0 deletions