locking/lockdep: Update two outdated comments

synchronize_sched() has been removed recently. Update the comments that
refer to synchronize_sched().

Signed-off-by: Bart Van Assche <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Johannes Berg <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Waiman Long <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: [email protected]
Cc: [email protected]
Fixes: 51959d85f32d ("lockdep: Replace synchronize_sched() with synchronize_rcu()") # v5.0-rc1
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

1 files changed, 3 insertions, 5 deletions

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 34cd87c65f5d..c7ca3a4def7e 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -4188,9 +4188,9 @@ static void __lockdep_free_key_range(void *start, unsigned long size)
  * Used in module.c to remove lock classes from memory that is going to be
  * freed; and possibly re-used by other modules.
  *
- * We will have had one sync_sched() before getting here, so we're guaranteed
- * nobody will look up these exact classes -- they're properly dead but still
- * allocated.
+ * We will have had one synchronize_rcu() before getting here, so we're
+ * guaranteed nobody will look up these exact classes -- they're properly dead
+ * but still allocated.
  */
 void lockdep_free_key_range(void *start, unsigned long size)
 {
@@ -4209,8 +4209,6 @@ void lockdep_free_key_range(void *start, unsigned long size)
 	/*
 	 * Wait for any possible iterators from look_up_lock_class() to pass
 	 * before continuing to free the memory they refer to.
-	 *
-	 * sync_sched() is sufficient because the read-side is IRQ disable.
 	 */
 	synchronize_rcu();