Merge patch series "Extend freeze support to suspend and hibernate"

Merge patch series "Extend freeze support to suspend and hibernate"

Christian Brauner <brauner@kernel.org> says:

Add the necessary infrastructure changes to support freezing for suspend
and hibernate. This should all that's needed to wire up power.

* patches from https://lore.kernel.org/r/20250329-work-freeze-v2-0-a47af37ecc3d@kernel.org:
  super: add filesystem freezing helpers for suspend and hibernate
  gfs2: pass through holder from the VFS for freeze/thaw
  super: use common iterator (Part 2)
  super: use a common iterator (Part 1)
  super: skip dying superblocks early
  super: simplify user_get_super()
  super: remove pointless s_root checks

Link: https://lore.kernel.org/r/20250329-work-freeze-v2-0-a47af37ecc3d@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>