tree cb4f7bc04116a3a4d673152096bc994131304574
parent b01da6a08c523f5d1cd1a51107f8cca061040f45
author Yan, Zheng <zyan@redhat.com> 1430445820 +0800
committer Ilya Dryomov <idryomov@gmail.com> 1435222168 +0300

ceph: use empty snap context for uninline_data and get_pool_perm

Cached_context in ceph_snap_realm is directly accessed by
uninline_data() and get_pool_perm(). This is racy in theory.
both uninline_data() and get_pool_perm() do not modify existing
object, they only create new object. So we can pass the empty
snap context to them.  Unlike cached_context in ceph_snap_realm,
we do not need to protect the empty snap context.

Signed-off-by: Yan, Zheng <zyan@redhat.com>