Merge tag 'vfs-7.0-rc1.nonblocking_timestamps' of git://git.kernel.org/pub/scm/linux...

Merge tag 'vfs-7.0-rc1.nonblocking_timestamps' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs timestamp updates from Christian Brauner:
 "This contains the changes to support non-blocking timestamp updates.

  Since commit 66fa3cedf16a ("fs: Add async write file modification
  handling") file_update_time_flags() unconditionally returns -EAGAIN
  when any timestamp needs updating and IOCB_NOWAIT is set. This makes
  non-blocking direct writes impossible on file systems with granular
  enough timestamps, which in practice means all of them.

  This reworks the timestamp update path to propagate IOCB_NOWAIT
  through ->update_time so that file systems which can update timestamps
  without blocking are no longer penalized.

  With that groundwork in place, the core change passes IOCB_NOWAIT into
  ->update_time and returns -EAGAIN only when the file system indicates
  it would block.

  XFS implements non-blocking timestamp updates by using the new
  ->sync_lazytime and open-coding generic_update_time without the
  S_NOWAIT check, since the lazytime path through the generic helpers
  can never block in XFS"

* tag 'vfs-7.0-rc1.nonblocking_timestamps' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  xfs: enable non-blocking timestamp updates
  xfs: implement ->sync_lazytime
  fs: refactor file_update_time_flags
  fs: add support for non-blocking timestamp updates
  fs: add a ->sync_lazytime method
  fs: factor out a sync_lazytime helper
  fs: refactor ->update_time handling
  fat: cleanup the flags for fat_truncate_time
  nfs: split nfs_update_timestamps
  fs: allow error returns from generic_update_time
  fs: remove inode_update_time