mainline inclusion
from mainline-5.0-rc1
commit fe5ed6c22e94b131ed5608d66ebce1efc39a7edb
category: bugfix
bugzilla: 18906
CVE: NA

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

The function xfs_alloc_get_freelist calls xfs_perag_put to drop the
reference. However, pag->pagf_btreeblks is read and written after the
put operation. This patch moves the put operation later.
Signed-off-by: NPan Bian <bianpan2016@163.com>
Reviewed-by: NCarlos Maiolino <cmaiolino@redhat.com>
[darrick: minor changelog edits]
Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: NDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Nyu kuai <yukuai3@huawei.com>
Reviewed-by: Nzhengbin <zhengbin13@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>