hulk inclusion
category: bugfix
bugzilla: 46904, https://gitee.com/openeuler/kernel/issues/I6KOXL
CVE: NA

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

When memory is fragmented, update_reserve_pages() may call migrate_pages()
to collect continuous memory. This function can sleep, so we should use
mutex lock instead of spin lock.

Fixes: 3eb69101b5e6 ("mm: Add two interface for dhugetlb")
Signed-off-by: NLiu Shixin <liushixin2@huawei.com>
Reviewed-by: NNanyong Sun <sunnanyong@huawei.com>
Reviewed-by: Ntong tiangen <tongtiangen@huawei.com>
Reviewed-by: NKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: NYongqiang Liu <liuyongqiang13@huawei.com>