Merge patch series "fs: tidy up step_into() & friends before inlining"

Cleanup step_into() and walk_component() and inline them both.

* patches from https://patch.msgid.link/20251120003803.2979978-1-mjguzik@gmail.com:
  fs: inline step_into() and walk_component()
  fs: tidy up step_into() & friends before inlining

Link: https://patch.msgid.link/20251120003803.2979978-1-mjguzik@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>