[PATCH 0/3] btrfs: get rid of compressed_bio::compressed_folios[] part 1

[Qu Wenruo <wqu@suse.com>]

Currently we have compressed_bio::compressed_folios[] allowing us to do
random access to any compressed folio, then we queue all folios in that
array into a real btrfs_bio, and submit that btrfs_bio for read/write.

However there is not really any need to do random access of that array.

All compression/decompression is doing sequential folio access.

The part 1 is some easy and safe conversion on decompression path.

The part 2 will handle the compression part, but unfortunately that will
require some changes all compression path, thus will need some extra
work.

And only after compression paths also got converted, we still need
that compressed_folios[] array for now.

Qu Wenruo (3):
  btrfs: use folio_iter to handle lzo_decompress_bio()
  btrfs: use folio_iter to handle zlib_decompress_bio()
  btrfs: use folio_iter to handle zstd_decompress_bio()

 fs/btrfs/lzo.c  | 48 +++++++++++++++++++++++++++++++++++++++---------
 fs/btrfs/zlib.c | 19 ++++++++++++-------
 fs/btrfs/zstd.c | 13 +++++++++----
 3 files changed, 60 insertions(+), 20 deletions(-)

-- 
2.52.0