From: Paul E. McKenney <paulmck@kernel.org>
Date: Sat, 2 Mar 2024 01:16:53 +0000 (-0800)
Subject: rcu: Remove redundant BH disabling in TINY_RCU
X-Git-Tag: v6.10-rc1~234^2~11
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3dbd8652f87b81fccb766bddb985ef46a1502f04;p=thirdparty%2Fkernel%2Flinux.git

rcu: Remove redundant BH disabling in TINY_RCU

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>
---

diff --git a/kernel/rcu/tiny.c b/kernel/rcu/tiny.c
index 705c0d16850aa..4470af926a34f 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;
 	}
 }