[PATCH 21/48] rcu: Remove redundant BH disabling in TINY_RCU

Uladzislau Rezki (Sony)
2024-05-07T09:35:54Z

From: "Paul E. McKenney" <paulmck@kernel.org>

The TINY_RCU rcu_process_callbacks() function is only ever invoked from
a softirq handler, which means that BH is already disabled. This commit
therefore removes the redundant local_bh_disable() and local_bh_ennable()
from this function.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
kernel/rcu/tiny.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/kernel/rcu/tiny.c b/kernel/rcu/tiny.c
index 705c0d16850a..4470af926a34 100644
--- a/kernel/rcu/tiny.c
+++ b/kernel/rcu/tiny.c
@@ -130,9 +130,7 @@ static __latent_entropy void rcu_process_callbacks(struct softirq_action *unused
next = list->next;
prefetch(next);
debug_rcu_head_unqueue(list);
- local_bh_disable();
rcu_reclaim_tiny(list);
- local_bh_enable();
list = next;
}
}
--
2.39.2