[PATCH v4 08/15] lockdep: Make crossrelease use save_stack_trace_fast()

[Byungchul Park]

Currently crossrelease feature uses save_stack_trace() to save
backtrace. However, it has much overhead. So this patch makes it
use save_stack_trace_norm() instead, which has smaller overhead.

Signed-off-by: Byungchul Park <byungchul.p...@lge.com>
---
 kernel/locking/lockdep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 2c8b2c1..fbd07ee 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -4768,7 +4768,7 @@ static void add_plock(struct held_lock *hlock, unsigned 
int prev_gen_id,
                plock->trace.max_entries = MAX_PLOCK_TRACE_ENTRIES;
                plock->trace.entries = plock->trace_entries;
                plock->trace.skip = 3;
-               save_stack_trace(&plock->trace);
+               save_stack_trace_fast(&plock->trace);
        }
 }
 
-- 
1.9.1