sched_ext: fix flag check for deferred callbacks

commit a3c4a0a42e61aad1056a3d33fd603c1ae66d4288 upstream.

When scheduling the deferred balance callbacks, check SCX_RQ_BAL_CB_PENDING
instead of SCX_RQ_BAL_PENDING. This way schedule_deferred() properly tests
whether there is already a pending request for queue_balance_callback() to
be invoked at the end of .balance().

Fixes: a8ad873113d3 ("sched_ext: defer queue_balance_callback() until after ops.dispatch")
Signed-off-by: Emil Tsalapatis <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: etsal

kernel/sched/ext.c

@@ -821,7 +821,7 @@ static void schedule_deferred(struct rq *rq)
 		return;
 
 	/* Don't do anything if there already is a deferred operation. */
-	if (rq->scx.flags & SCX_RQ_BAL_PENDING)
+	if (rq->scx.flags & SCX_RQ_BAL_CB_PENDING)
 		return;
 
 	/*