lockstat: repair erronous contention statistics

Fix bad contention counting in /proc/lock_stat.

/proc/lockstat tries to gather per-ip contention
statistics per-lock.  This was failing due to
a garbage per-ip index selector being used.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 3bfb187..b5db51d 100644 (file)
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -3029,7 +3029,7 @@ found_it:
 
        stats = get_lock_stats(hlock_class(hlock));
        if (point < ARRAY_SIZE(stats->contention_point))
-               stats->contention_point[i]++;
+               stats->contention_point[point]++;
        if (lock->cpu != smp_processor_id())
                stats->bounces[bounce_contended + !!hlock->read]++;
        put_lock_stats(stats);