!9666 ftrace: Fix rcu warn in ftrace_location()

Merge Pull Request from: @ci-robot 
 
PR sync from: Zheng Yejian <zhengyejian1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/FE565TYK5K7MZ5Z3XDQDAY2BFBMRFJ67/ 
 
https://gitee.com/openeuler/kernel/issues/IAA3U5 
 
Link:https://gitee.com/openeuler/kernel/pulls/9666

 

Reviewed-by: Ye Weihua <yeweihua4@huawei.com>
Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>