diff mbox series

[v2,05/17] printk: Mark logbuf_lock & console_owner_lock as terminal locks

Message ID 1542653726-5655-6-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. 19, 2018, 6:55 p.m. UTC 
By marking logbuf_lock and console_owner_lock as terminal locks,
it reduces the performance overhead when those locks are used with
lockdep enabled.

Signed-off-by: Waiman Long <longman@redhat.com>
---
 kernel/printk/printk.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 1b2a029..bdbbe31 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
@@ -1568,7 +1568,7 @@  int do_syslog(int type, char __user *buf, int len, int source)
 };
 #endif
 
-static DEFINE_RAW_SPINLOCK(console_owner_lock);
+static DEFINE_RAW_TERMINAL_SPINLOCK(console_owner_lock);
 static struct task_struct *console_owner;
 static bool console_waiter;