!5502 pstore/ram: Fix crash when setting number of cpus to an odd number

Merge Pull Request from: @ci-robot 
 
PR sync from: Zeng Heng <zengheng4@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/63LTV7WWZNE2IZQ7U37B2GJMJSGFSQOS/ 
 
https://gitee.com/src-openeuler/kernel/issues/I99JQV 
 
Link:https://gitee.com/openeuler/kernel/pulls/5502

 

Reviewed-by: Wei Li <liwei391@huawei.com>
Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>