sched: clear credit count in error branch

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7EBSH
CVE: NA

-------------------------------

Clear credit count if sched_prefer_cpus_fork failed.

Fixes: 243865da ("cpuset: Introduce new interface for scheduler dynamic affinity")
Signed-off-by: NHui Tang <tanghui20@huawei.com>
Reviewed-by: NZhang Qiao <zhangqiao22@huawei.com>
Signed-off-by: NZhang Changzhong <zhangchangzhong@huawei.com>

kernel/fork.c

@@ -1878,7 +1878,7 @@ static __latent_entropy struct task_struct *copy_process(
 #ifdef CONFIG_QOS_SCHED_DYNAMIC_AFFINITY
 	retval = sched_prefer_cpus_fork(p, current);
 	if (retval)
-		goto bad_fork_free;
+		goto bad_fork_cleanup_count;
 #endif
 #ifdef CONFIG_QOS_SCHED_SMART_GRID
 	retval = sched_grid_qos_fork(p, current);