sched/fair: Remove unused 'curr' argument from pick_next_entity()

The 'curr' argument of pick_next_entity() has become unused after
the EEVDF changes.

[ mingo: Updated the changelog. ]
Signed-off-by: Yiwei Lin <s921975628@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20231020055617.42064-1-s921975628@gmail.com

kernel/sched/fair.c

@@ -5256,7 +5256,7 @@ set_next_entity(struct cfs_rq *cfs_rq, struct sched_entity *se)
  * 4) do not run the "skip" process, if something else is available
  */
 static struct sched_entity *
-pick_next_entity(struct cfs_rq *cfs_rq, struct sched_entity *curr)
+pick_next_entity(struct cfs_rq *cfs_rq)
 {
 	/*
 	 * Enabling NEXT_BUDDY will affect latency but not fairness.
@@ -8160,7 +8160,7 @@ static struct task_struct *pick_task_fair(struct rq *rq)
 				goto again;
 		}
 
-		se = pick_next_entity(cfs_rq, curr);
+		se = pick_next_entity(cfs_rq);
 		cfs_rq = group_cfs_rq(se);
 	} while (cfs_rq);
 
@@ -8223,7 +8223,7 @@ pick_next_task_fair(struct rq *rq, struct task_struct *prev, struct rq_flags *rf
 			}
 		}
 
-		se = pick_next_entity(cfs_rq, curr);
+		se = pick_next_entity(cfs_rq);
 		cfs_rq = group_cfs_rq(se);
 	} while (cfs_rq);
 
@@ -8262,7 +8262,7 @@ pick_next_task_fair(struct rq *rq, struct task_struct *prev, struct rq_flags *rf
 		put_prev_task(rq, prev);
 
 	do {
-		se = pick_next_entity(cfs_rq, NULL);
+		se = pick_next_entity(cfs_rq);
 		set_next_entity(cfs_rq, se);
 		cfs_rq = group_cfs_rq(se);
 	} while (cfs_rq);