erofs fixes for 7.0-rc6

Hi Linus,

Could you consider these fixes for 7.0-rc6?

There are three random fixes and a Kconfig refinement. Details are shown below..

Thanks,
Gao Xiang

The following changes since commit 1f318b96cc84d7c2ab792fcc0bfd42a7ca890681:

Linux 7.0-rc3 (2026-03-08 16:56:54 -0700)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git tags/erofs-for-7.0-rc6-fixes

for you to fetch changes up to 2f0407ed923b7eb363424033fc12fe253da139c4:

erofs: fix .fadvise() for page cache sharing (2026-03-25 10:40:02 +0800)

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

- Mark I/Os as failed when encountering short reads on file-backed mounts

- Label GFP_NOIO in the BIO completion when the completion is in the process context, and directly call into the decompression to avoid deadlocks

- Improve Kconfig descriptions to better highlight the overall efforts

- Fix .fadvise() for page cache sharing

----------------------------------------------------------------
Gao Xiang (2):
erofs: update the Kconfig description
erofs: fix .fadvise() for page cache sharing

Jiucheng Xu (1):
erofs: add GFP_NOIO in the bio completion if needed

Sheng Yong (1):
erofs: set fileio bio failed in short read case

 fs/erofs/Kconfig  | 45 ++++++++++++++++++++++++++++++---------------
 fs/erofs/fileio.c |  6 ++----
 fs/erofs/ishare.c | 15 +++++++++++++--
 fs/erofs/zdata.c  |  3 +++
 4 files changed, 48 insertions(+), 21 deletions(-)