A few more patches that were Cc'd stable but failed to apply to 3.18, backported with the 4.4 queue variants as reference wherever required.
Matthew Wilcox (1): mm/filemap.c: fix NULL pointer in page_cache_tree_insert()
Michal Hocko (1): mm: allow GFP_{FS,IO} for page_cache_read page cache allocation
Theodore Ts'o (2): ext4: fix deadlock between inline_data and ext4_expand_extra_isize_ea() ext4: don't update checksum of new initialized bitmaps
wangguang (1): ext4: bugfix for mmaped pages in mpage_release_unused_pages()
fs/ext4/balloc.c | 3 +-- fs/ext4/ialloc.c | 43 +++--------------------------- fs/ext4/inline.c | 66 +++++++++++++++++++++------------------------- fs/ext4/inode.c | 2 ++ fs/ext4/xattr.c | 30 +++++++++------------ fs/ext4/xattr.h | 32 ++++++++++++++++++++++ include/linux/mm.h | 4 +++ mm/filemap.c | 12 ++++----- mm/memory.c | 17 ++++++++++++ 9 files changed, 107 insertions(+), 102 deletions(-)