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memcg-v1: remove folio_memcg_lock() doc reference

Commit a29c0e4b2e86 ("memcg-v1: remove memcg move locking code") removed
folio_memcg_lock(). Delete the final lingering documentation reference.

Link: https://lkml.kernel.org/r/20260101225552.3423108-1-gthelen@google.com
Fixes: a29c0e4b2e86 ("memcg-v1: remove memcg move locking code")
Signed-off-by: Greg Thelen <gthelen@google.com>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: SeongJae Park <sj@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Michal Koutný" <mkoutny@suse.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

authored by

Greg Thelen and committed by
Andrew Morton 0bec7516 743758cc

+2 -3
+2 -3
Documentation/admin-guide/cgroup-v1/memory.rst
··· 311 311 312 312 folio_lock 313 313 mm->page_table_lock or split pte_lock 314 - folio_memcg_lock (memcg->move_lock) 315 - mapping->i_pages lock 316 - lruvec->lru_lock. 314 + mapping->i_pages lock 315 + lruvec->lru_lock. 317 316 318 317 Per-node-per-memcgroup LRU (cgroup's private LRU) is guarded by 319 318 lruvec->lru_lock; the folio LRU flag is cleared before