erofs updates for 7.2-rc1

Hi Linus,

Sorry for late email this time, but could you consider these commits for 7.2-rc1?

The most notable change is the removal of the fscache backend: it has been deprecated for almost two years, mainly because EROFS file-backed mounts and fanotify pre-content hooks (together with erofs-utils) now provide better functionality and simpler codebase. In addition, fscache has depended on netfslib for years, which is undesirable for EROFS since it is a local filesystem. More details are shown in [1].

In addition, sparse support has been added to the pcluster layout, which is helpful for large sparse AI datasets, and map requests for chunk-based inodes have been optimized to be more efficient as well. There are also the usual fixes and cleanups.

All commits have been in -next and no potential merge conflict is observed.

Thanks,
Gao Xiang

[1] https://lore.kernel.org/r/[email protected]

The following changes since commit 4549871118cf616eecdd2d939f78e3b9e1dddc48:

Linux 7.1-rc7 (2026-06-07 15:37:58 -0700)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git tags/erofs-for-7.2-rc1

for you to fetch changes up to 803d09a554055aba160a62abd1e4b1260b899dc1:

erofs: handle 48-bit blocks_hi for compressed inodes (2026-06-22 18:50:36 +0800)

----------------------------------------------------------------
Changes since last update:

- Report more consecutive chunks of the same type for each iomap request

- Add sparse support for the pcluster layout

- Update the EROFS documentation overview

- Remove the deprecated fscache backend

- Various fixes and cleanups

----------------------------------------------------------------
Gao Xiang (7):
erofs: clean up erofs_ishare_fill_inode()
erofs: update the overview of the documentation
erofs: call erofs_exit_ishare() before rcu_barrier()
erofs: introduce erofs_map_chunks()
erofs: add sparse support to pcluster layout
erofs: simplify RCU read critical sections
erofs: remove fscache backend entirely

Zhan Xusheng (2):
erofs: add folio order to trace_erofs_read_folio
erofs: handle 48-bit blocks_hi for compressed inodes

 Documentation/filesystems/erofs.rst | 138 ++++----
 fs/erofs/Kconfig                    |  21 +-
 fs/erofs/Makefile                   |   1 -
 fs/erofs/data.c                     | 135 ++++----
 fs/erofs/erofs_fs.h                 |   2 +
 fs/erofs/fscache.c                  | 664 ------------------------------------
 fs/erofs/inode.c                    |   7 +-
 fs/erofs/internal.h                 |  72 +---
 fs/erofs/ishare.c                   |  47 ++-
 fs/erofs/super.c                    |  98 ++----
 fs/erofs/zdata.c                    |  38 +--
 fs/erofs/zmap.c                     |  33 +-
 include/trace/events/erofs.h        |   9 +-
 13 files changed, 231 insertions(+), 1034 deletions(-)
 delete mode 100644 fs/erofs/fscache.c