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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-02-11 07:29:02 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-02-20 16:00:20 -0800 |
| commit | b692dc4adfcff5430467bec8efed3c07d1772eaf (patch) | |
| tree | 7ec4a4b04ede14654e0e5489ed99df83641bf2ad /kernel/rcu/tree.c | |
| parent | aa96a93ba2bbad5e1b24706daffa14c4f1c50d2a (diff) | |
rcu: Update __call_rcu() comments
The __call_rcu() function's header comment refers to a cpu argument
that no longer exists, and the comment of the return path from
rcu_nocb_try_bypass() ignores the non-no-CBs CPU case. This commit
therefore update both comments.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu/tree.c')
| -rw-r--r-- | kernel/rcu/tree.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 48fba2257748..0a9de9fd43ed 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -2642,12 +2642,7 @@ static void check_cb_ovld(struct rcu_data *rdp) raw_spin_unlock_rcu_node(rnp); } -/* - * Helper function for call_rcu() and friends. The cpu argument will - * normally be -1, indicating "currently running CPU". It may specify - * a CPU only if that CPU is a no-CBs CPU. Currently, only rcu_barrier() - * is expected to specify a CPU. - */ +/* Helper function for call_rcu() and friends. */ static void __call_rcu(struct rcu_head *head, rcu_callback_t func) { @@ -2688,7 +2683,7 @@ __call_rcu(struct rcu_head *head, rcu_callback_t func) check_cb_ovld(rdp); if (rcu_nocb_try_bypass(rdp, head, &was_alldone, flags)) return; // Enqueued onto ->nocb_bypass, so just leave. - /* If we get here, rcu_nocb_try_bypass() acquired ->nocb_lock. */ + // If no-CBs CPU gets here, rcu_nocb_try_bypass() acquired ->nocb_lock. rcu_segcblist_enqueue(&rdp->cblist, head); if (__is_kfree_rcu_offset((unsigned long)func)) trace_rcu_kfree_callback(rcu_state.name, head, |