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srcu: Update cleanup_srcu_struct() comment

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Now that we have polled SRCU grace periods, a grace period can be
started by start_poll_synchronize_srcu() as well as call_srcu(),
synchronize_srcu(), and synchronize_srcu_expedited().  This commit
therefore calls out this new start_poll_synchronize_srcu() possibility
in the comment on the WARN_ON().

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2024-06-11 08:14:08 -07:00
parent 395e73bd8d
commit d7b0615cb8
1 changed files with 4 additions and 1 deletions
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kernel/rcu/srcutree.c
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@ -667,7 +667,10 @@ void cleanup_srcu_struct(struct srcu_struct *ssp)
pr_info("%s: Active srcu_struct %p read state: %d gp state: %lu/%lu\n",
__func__, ssp, rcu_seq_state(READ_ONCE(sup->srcu_gp_seq)),
rcu_seq_current(&sup->srcu_gp_seq), sup->srcu_gp_seq_needed);
return; /* Caller forgot to stop doing call_srcu()? */
return; // Caller forgot to stop doing call_srcu()?
// Or caller invoked start_poll_synchronize_srcu()
// and then cleanup_srcu_struct() before that grace
// period ended?
}
kfree(sup->node);
sup->node = NULL;