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Subject[tip: core/rcu] rcu: Make rcu_gp_cleanup() be noinline for tracing
The following commit has been merged into the core/rcu branch of tip:

Commit-ID: 2f20de99a63b0de9bcceedafc3281e65fbf7d4fd
Gitweb: https://git.kernel.org/tip/2f20de99a63b0de9bcceedafc3281e65fbf7d4fd
Author: Paul E. McKenney <paulmck@kernel.org>
AuthorDate: Sun, 11 Apr 2021 10:49:52 -07:00
Committer: Paul E. McKenney <paulmck@kernel.org>
CommitterDate: Mon, 10 May 2021 16:22:54 -07:00

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>
---
kernel/rcu/tree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 00a3ebc..6eb64e4 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;
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