rcu: Localize rcu_state ->orphan_pend and ->orphan_done

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Given that the rcu_state structure's >orphan_pend and ->orphan_done
fields are used only during migration of callbacks from the recently
offlined CPU to a surviving CPU, if rcu_send_cbs_to_orphanage() and
rcu_adopt_orphan_cbs() are combined, these fields can become local
variables in the combined function.  This commit therefore combines
rcu_send_cbs_to_orphanage() and rcu_adopt_orphan_cbs() into a new
rcu_segcblist_merge() function and removes the ->orphan_pend and
->orphan_done fields.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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This commit is contained in:

Paul E. McKenney 2017-06-27 07:44:06 -07:00

parent 21cc248384

commit f2dbe4a562

4 changed files with 30 additions and 75 deletions

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24

kernel/rcu/rcu_segcblist.c

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2

kernel/rcu/rcu_segcblist.h

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73

kernel/rcu/tree.c

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6

kernel/rcu/tree.h

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