[RFC PATCH 04/12] printk: Make logbuf_lock a terminal lock

Waiman Long
2018-11-08T20:35:37Z

By making logbuf_lock a terminal lock, it reduces the performance
overhead when lockdep is enabled.

Signed-off-by: Waiman Long <longman@redhat.com>
---
kernel/printk/printk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 1b2a029..6b63fda 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -367,7 +367,7 @@ __packed __aligned(4)
* within the scheduler's rq lock. It must be released before calling
* console_unlock() or anything else that might wake up a process.
*/
-DEFINE_RAW_SPINLOCK(logbuf_lock);
+DEFINE_RAW_TERMINAL_SPINLOCK(logbuf_lock);

/*
* Helper macros to lock/unlock logbuf_lock and switch between
--
1.8.3.1