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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-04-13 17:11:44 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-05-15 10:28:07 -0700 |
| commit | 5b4c11d54b1b8d0714702006e00441ada59889a9 (patch) | |
| tree | 49e052b1402d46a7a283f29913c045ee6e36b153 /kernel/rcu/tree_plugin.h | |
| parent | 4317228ad9b86f094d70c951f9210a8a9b2816be (diff) | |
| download | linux-5b4c11d54b1b8d0714702006e00441ada59889a9.tar.bz2 | |
rcu: Add leaf-node macros
This commit adds rcu_first_leaf_node() that returns a pointer to
the first leaf rcu_node structure in the specified RCU flavor and an
rcu_is_leaf_node() that returns true iff the specified rcu_node structure
is a leaf. This commit also uses these macros where appropriate.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Nicholas Piggin <npiggin@gmail.com>
Diffstat (limited to 'kernel/rcu/tree_plugin.h')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index d37b9bb3f481..b999032e9466 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -182,7 +182,7 @@ static void rcu_preempt_ctxt_queue(struct rcu_node *rnp, struct rcu_data *rdp) raw_lockdep_assert_held_rcu_node(rnp); WARN_ON_ONCE(rdp->mynode != rnp); - WARN_ON_ONCE(rnp->level != rcu_num_lvls - 1); + WARN_ON_ONCE(!rcu_is_leaf_node(rnp)); /* * Decide where to queue the newly blocked task. In theory, @@ -533,7 +533,7 @@ void rcu_read_unlock_special(struct task_struct *t) rnp = t->rcu_blocked_node; raw_spin_lock_rcu_node(rnp); /* irqs already disabled. */ WARN_ON_ONCE(rnp != t->rcu_blocked_node); - WARN_ON_ONCE(rnp->level != rcu_num_lvls - 1); + WARN_ON_ONCE(!rcu_is_leaf_node(rnp)); empty_norm = !rcu_preempt_blocked_readers_cgp(rnp); empty_exp = sync_rcu_preempt_exp_done(rnp); smp_mb(); /* ensure expedited fastpath sees end of RCU c-s. */ |