erofs updates for 6.16-rc1

Hi Linus,

Could you consider this pull request for 6.16-rc1?

In this cycle, Intel QAT hardware accelerators are supported to improve DEFLATE decompression performance. I've also tested it with the enwik9 dataset of 1 MiB pclusters on our Intel Sapphire Rapids bare-metal server and a PL0 ESSD, and the sequential read performance even surpasses LZ4 software decompression on this setup.

In addition, a fsoffset mount option is introduced for file-backed mounts to specify the filesystem offset in order to adapt customized container formats.

There are other improvements and minor cleanups shown as below. All commits have been in -next, and no potential merge conflicts are observed.

Thanks,
Gao Xiang

The following changes since commit 82f2b0b97b36ee3fcddf0f0780a9a0825d52fec3:

Linux 6.15-rc6 (2025-05-11 14:54:11 -0700)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git tags/erofs-for-6.16-rc1

for you to fetch changes up to b4a29efc51461edf1a02e9da656d4480cabd24b0:

erofs: support DEFLATE decompression by using Intel QAT (2025-05-25 15:27:40 +0800)

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

- Add a fsoffset mount option to specify the filesystem offset;

- Support Intel QAT accelerators to boost up the DEFLATE algorithm;

- Initialize per-CPU workers and CPU hotplug hooks lazily to avoid unnecessary overhead when EROFS is not mounted;

- Fix file handle encoding for 64-bit NIDs;

- Minor cleanups.

----------------------------------------------------------------
Bo Liu (1):
erofs: support DEFLATE decompression by using Intel QAT

Gao Xiang (2):
erofs: refine readahead tracepoint
erofs: clean up erofs_{init,exit}_sysfs()

Hongbo Li (1):
erofs: fix file handle encoding for 64-bit NIDs

Sandeep Dhavale (1):
erofs: lazily initialize per-CPU workers and CPU hotplug hooks

Sheng Yong (2):
erofs: avoid using multiple devices with different type
erofs: add 'fsoffset' mount option to specify filesystem offset

 Documentation/ABI/testing/sysfs-fs-erofs |   8 ++
 Documentation/filesystems/erofs.rst      |   1 +
 fs/erofs/Kconfig                         |  14 +++
 fs/erofs/Makefile                        |   1 +
 fs/erofs/compress.h                      |  10 ++
 fs/erofs/data.c                          |   5 +-
 fs/erofs/decompressor_crypto.c           | 181 +++++++++++++++++++++++++++++++
 fs/erofs/decompressor_deflate.c          |  20 +++-
 fs/erofs/fileio.c                        |   5 +-
 fs/erofs/internal.h                      |   3 +-
 fs/erofs/super.c                         |  65 +++++++++--
 fs/erofs/sysfs.c                         |  67 ++++++++----
 fs/erofs/zdata.c                         |  79 ++++++++++----
 include/trace/events/erofs.h             |   2 +-
 14 files changed, 397 insertions(+), 64 deletions(-)
 create mode 100644 fs/erofs/decompressor_crypto.c