[GIT PULL] erofs fixes for 5.4-rc2

[Gao Xiang]

Hi Linus,

Could you consider this pull request for 5.4-rc2?

3 patches of those address regressions due to recent cleanups, mainly
founded by stress test on latest mainline kernel (no more regression
out compared with older kernels for more than a week). The other patch
updates sub-entries in MAINTAINERS.

All commits have been in -next for a week (since 20190924). In order to
avoiding using a random base of a random day, I just rebased those fixes
on -rc1 stable point without any change, which are now in next-20191001
as well. This merges cleanly with master.

This is my first pull request, due to National Day holiday I'd use my
personal email. I refered many other past pull requests these days,
kindly let me know if something wrong...

Thanks,
Gao Xiang

The following changes since commit 54ecb8f7028c5eb3d740bb82b0f1d90f2df63c5c:

  Linux 5.4-rc1 (2019-09-30 10:35:40 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git tags/erofs-for-5.4-rc2-fixes

for you to fetch changes up to dc76ea8c1087b5c44235566ed4be2202d21a8504:

  erofs: fix mis-inplace determination related with noio chain (2019-10-01 04:54:45 +0800)

----------------------------------------------------------------
Changes since last update:
- Resolve 3 regressions due to recent cleanups:
  Fix error handling due to avoiding sb_bread in erofs_read_superblock;
  Fix locking in erofs_get_meta_page;
  Fix mis-inplace behavior due to decompression frontend cleanup.
- Update sub-entries in MAINTAINERS in order to better blame.

----------------------------------------------------------------
Gao Xiang (3):
      MAINTAINERS: erofs: complete sub-entries for erofs
      erofs: fix erofs_get_meta_page locking due to a cleanup
      erofs: fix mis-inplace determination related with noio chain

Wei Yongjun (1):
      erofs: fix return value check in erofs_read_superblock()

 MAINTAINERS      |  3 +++
 fs/erofs/data.c  | 10 +++++++---
 fs/erofs/super.c |  4 ++--
 fs/erofs/zdata.c | 12 ++++++++++--
 4 files changed, 22 insertions(+), 7 deletions(-)