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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-04-18 14:14:42 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-05-15 10:29:41 -0700 |
| commit | 0ae94e00ce40e4447080ab7675220f725c690330 (patch) | |
| tree | d5c003296ddde1203898a0cb56665c5a2abeb49e /kernel/rcu/tree.c | |
| parent | 51af970d19f395fc57b82514022126de6c5420cd (diff) | |
| download | op-kernel-dev-0ae94e00ce40e4447080ab7675220f725c690330.zip op-kernel-dev-0ae94e00ce40e4447080ab7675220f725c690330.tar.gz | |
rcu: Make rcu_future_needs_gp() check all ->need_future_gps[] elements
Currently, the rcu_future_needs_gp() function checks only the current
element of the ->need_future_gps[] array, which might miss elements that
were offset from the expected element, for example, due to races with
the start or the end of a grace period. This commit therefore makes
rcu_future_needs_gp() use the need_any_future_gp() macro to check all
of the elements of this array.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Nicholas Piggin <npiggin@gmail.com>
Diffstat (limited to 'kernel/rcu/tree.c')
| -rw-r--r-- | kernel/rcu/tree.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index afc5e32..b05ab63 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -720,7 +720,7 @@ static int rcu_future_needs_gp(struct rcu_state *rsp) struct rcu_node *rnp = rcu_get_root(rsp); lockdep_assert_irqs_disabled(); - return READ_ONCE(need_future_gp_element(rnp, rnp->completed)); + return need_any_future_gp(rnp); } /* |
