[to-be-updated] mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.patch removed from -mm tree

[Andrew Morton <akpm@linux-foundation.org>]

The quilt patch titled
     Subject: mm/page_owner: hoist CONFIG_MEMCG to function level for print_page_owner_memcg()
has been removed from the -mm tree.  Its filename was
     mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.patch

This patch was dropped because an updated version will be issued

------------------------------------------------------
From: Ye Liu <ye.liu@linux.dev>
Subject: mm/page_owner: hoist CONFIG_MEMCG to function level for print_page_owner_memcg()
Date: Tue, 23 Jun 2026 14:52:28 +0800

The print_page_owner_memcg() function has CONFIG_MEMCG guarding its entire
body via #ifdef inside the function, which leaves a no-op { return ret; }
when the config is disabled.  Hoist the #ifdef to the top level so the
real implementation and the empty stub are two clearly separated
definitions.

No functional change.

Link: https://lore.kernel.org/20260623065234.31866-4-ye.liu@linux.dev
Signed-off-by: Ye Liu <ye.liu@linux.dev>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_owner.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/mm/page_owner.c~mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg
+++ a/mm/page_owner.c
@@ -529,13 +529,13 @@ ext_put_continue:
 	seq_putc(m, '\n');
 }
 
+#ifdef CONFIG_MEMCG
 /*
  * Looking for memcg information and print it out
  */
 static inline int print_page_owner_memcg(char *kbuf, size_t count, int ret,
 					 struct page *page)
 {
-#ifdef CONFIG_MEMCG
 	unsigned long memcg_data;
 	struct mem_cgroup *memcg;
 	bool online;
@@ -563,10 +563,16 @@ static inline int print_page_owner_memcg
 			name);
 out_unlock:
 	rcu_read_unlock();
-#endif /* CONFIG_MEMCG */
 
 	return ret;
 }
+#else
+static inline int print_page_owner_memcg(char *kbuf, size_t count, int ret,
+					 struct page *page)
+{
+	return ret;
+}
+#endif
 
 static ssize_t
 print_page_owner(char __user *buf, size_t count, unsigned long pfn,
_

Patches currently in -mm which might be from ye.liu@linux.dev are

a.patch
mm-page_owner-add-missing-newline-to-count_threshold-format-string.patch
mm-page_owner-move-free_ts_nsec-output-to-free-section-in-__dump_page_owner.patch
mm-page_owner-drop-redundant-page_owner-prefix-from-static-symbols.patch
mm-page_owner-clamp-skip_buddy_pages-pfn-advance-at-max_order_nr_pages-boundary.patch
mm-page_owner-use-memcg_data-snapshot-instead-of-pagememcgkmem-to-avoid-toctou-vm_bug_on.patch