Hi folks,

erofs_get_meta_page() is actually inflexible since it's too
close to the page itself.

In order to prepare for folio and subpage features, introduce
on-stack meta buffer descriptor instead and convert all
erofs_get_meta_page() users to use it.

It can also be used for new potential backends such as fscache or mtd.

Patches are trivial.

Thanks,
Gao Xiang

Gao Xiang (5):
  erofs: introduce meta buffer operations
  erofs: use meta buffers for inode operations
  erofs: use meta buffers for super operations
  erofs: use meta buffers for xattr operations
  erofs: use meta buffers for zmap operations

 fs/erofs/data.c     | 102 +++++++++++++++++++++++++-----------
 fs/erofs/inode.c    |  68 ++++++++++++------------
 fs/erofs/internal.h |  22 ++++++--
 fs/erofs/super.c    | 105 ++++++++++---------------------------
 fs/erofs/xattr.c    | 123 +++++++++++++-------------------------------
 fs/erofs/zdata.c    |  23 ++++-----
 fs/erofs/zmap.c     |  56 ++++++--------------
 7 files changed, 211 insertions(+), 288 deletions(-)

-- 
2.24.4