From: Paul E. McKenney <paulmck@kernel.org>
Date: Sun, 11 Apr 2021 17:49:52 +0000 (-0700)
Subject: rcu: Make rcu_gp_cleanup() be noinline for tracing
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2f20de99a63b0de9bcceedafc3281e65fbf7d4fd;p=linux.git

rcu: Make rcu_gp_cleanup() be noinline for tracing

Although there are trace events for RCU grace periods, these are only
enabled in CONFIG_RCU_TRACE=y kernels.  This commit therefore marks
rcu_gp_cleanup() noinline in order to provide a function that can be
traced that is invoked near the end of each grace period.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 00a3ebca70b8d..6eb64e44bdcd8 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2026,7 +2026,7 @@ static void rcu_gp_fqs_loop(void)
 /*
  * Clean up after the old grace period.
  */
-static void rcu_gp_cleanup(void)
+static noinline void rcu_gp_cleanup(void)
 {
 	int cpu;
 	bool needgp = false;