sched: Fix use of count for nr_running tracepoint

The count field is meant to tell if an update to nr_running
is an add or a subtract. Make it do so by adding the missing
minus sign.

Fixes: 9d246053a691 ("sched: Add a tracepoint to track rq->nr_running")
Signed-off-by: Phil Auld <pauld@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200805203138.1411-1-pauld@redhat.com

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 3fd2838..28709f6 100644 (file)
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1999,7 +1999,7 @@ static inline void sub_nr_running(struct rq *rq, unsigned count)
 {
        rq->nr_running -= count;
        if (trace_sched_update_nr_running_tp_enabled()) {
-               call_trace_sched_update_nr_running(rq, count);
+               call_trace_sched_update_nr_running(rq, -count);
        }
 
        /* Check if we still need preemption */