diff mbox series

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

Message ID 1541709268-3766-5-git-send-email-longman@redhat.com (mailing list archive)
State New, archived
Headers show
Series locking/lockdep: Add a new class of terminal locks | expand

Commit Message

Waiman Long Nov. 8, 2018, 8:34 p.m. UTC 
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(-)
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Patch

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