Merge tag 'ovl-update-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/overlayf...

Pull overlayfs updates from Amir Goldstein:

 - Work by André Almeida to support case-insensitive overlayfs

   Underlying case-insensitive filesystems casefolding is per directory,
   but for overlayfs it is all-or-nothing. It supports layers where all
   directories are casefolded (with same encoding) or layers where no
   directories are casefolded.

 - A fix for a "bug" in Neil's ovl directory lock changes, which only
   manifested itself with casefold enabled layers which may return an
   unhashed negative dentry from lookup.

* tag 'ovl-update-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs:
  ovl: make sure that ovl_create_real() returns a hashed dentry
  ovl: Support mounting case-insensitive enabled layers
  ovl: Check for casefold consistency when creating new dentries
  ovl: Add S_CASEFOLD as part of the inode flag to be copied
  ovl: Set case-insensitive dentry operations for ovl sb
  ovl: Ensure that all layers have the same encoding
  ovl: Create ovl_casefold() to support casefolded strncmp()
  ovl: Prepare for mounting case-insensitive enabled layers
  fs: Create sb_same_encoding() helper
  fs: Create sb_encoding() helper

diff --cc fs/overlayfs/overlayfs.h
Simple merge

diff --cc fs/overlayfs/readdir.c
Simple merge

diff --cc fs/overlayfs/super.c
Simple merge

diff --cc include/linux/fs.h
Simple merge