Pull Ceph updates from Sage Weil:
"There is some follow-on RBD cleanup after the last window's code drop,
a series from Yan fixing multi-mds behavior in cephfs, and then a
sprinkling of bug fixes all around. Some warnings, sleeping while
atomic, a null dereference, and cleanups"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (36 commits)
libceph: fix invalid unsigned->signed conversion for timespec encoding
libceph: call r_unsafe_callback when unsafe reply is received
ceph: fix race between cap issue and revoke
ceph: fix cap revoke race
ceph: fix pending vmtruncate race
ceph: avoid accessing invalid memory
libceph: Fix NULL pointer dereference in auth client code
ceph: Reconstruct the func ceph_reserve_caps.
ceph: Free mdsc if alloc mdsc->mdsmap failed.
ceph: remove sb_start/end_write in ceph_aio_write.
ceph: avoid meaningless calling ceph_caps_revoking if sync_mode == WB_SYNC_ALL.
ceph: fix sleeping function called from invalid context.
ceph: move inode to proper flushing list when auth MDS changes
rbd: fix a couple warnings
ceph: clear migrate seq when MDS restarts
ceph: check migrate seq before changing auth cap
ceph: fix race between page writeback and truncate
ceph: reset iov_len when discarding cap release messages
ceph: fix cap release race
libceph: fix truncate size calculation
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