rcu: Clarify role of ->expmaskinitnext

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Analogy with the ->qsmaskinitnext field might lead one to believe that
->expmaskinitnext tracks online CPUs.  This belief is incorrect: Any CPU
that has ever been online will have its bit set in the ->expmaskinitnext
field.  This commit therefore adds a comment to make this clear, at
least to people who read comments.

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

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Paul E. McKenney 2015-09-29 09:45:00 -07:00

parent 06f60de19d

commit 1de6e56ddc

1 changed files with 2 additions and 0 deletions

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kernel/rcu/tree.h

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