[PATCH v4 0/4] fs/9p: fix mmap regression

[Eric Van Hensbergen]

This series attempts to fix a reported exception with mmap
on newer kernels. 

Fixes: 1543b4c5071c ("fs/9p: remove writeback fid and fix per-file modes")
Reported-by: Robert Schwebel <r.schwebel@xxxxxxxxxxxxxx>
Closes: https://lore.kernel.org/v9fs/ZK25XZ%2BGpR3KHIB%2F@xxxxxxxxxxxxxx
Signed-off-by: Eric Van Hensbergen <ericvh@xxxxxxxxxx>
---
Changes in v4:
- Another attempt to fix tags for regression and stable, sorry for the
  noise.
- Link to v3: https://lore.kernel.org/r/20230716-fixes-overly-restrictive-mmap-v3-0-769791f474fd@xxxxxxxxxx

Changes in v3:
- Clarify debug print to read-only mmap mode versus no mmap mode in
  v9fs_file_mmap
- Fix suggested regression tags and propagate across series
- Link to v2: https://lore.kernel.org/r/20230716-fixes-overly-restrictive-mmap-v2-0-147d6b93f699@xxxxxxxxxx

Changes in v2:
- fix requested changes in commit messages
- add patch to remove unnecessary invalidate_inode_pages in mmap readonly path
- Link to v1: https://lore.kernel.org/r/20230716-fixes-overly-restrictive-mmap-v1-0-0683b283b932@xxxxxxxxxx

---
Eric Van Hensbergen (4):
      fs/9p: remove unnecessary and overrestrictive check
      fs/9p: fix typo in comparison logic for cache mode
      fs/9p: fix type mismatch in file cache mode helper
      fs/9p: remove unnecessary invalidate_inode_pages2

 fs/9p/fid.h      | 6 +++---
 fs/9p/vfs_file.c | 5 +----
 2 files changed, 4 insertions(+), 7 deletions(-)
---
base-commit: 95f41d87810083d8b3dedcce46a4e356cf4a9673
change-id: 20230716-fixes-overly-restrictive-mmap-30a23501e787

Best regards,
-- 
Eric Van Hensbergen <ericvh@xxxxxxxxxx>