[Devel] [PATCH RHEL10 COMMIT] mm/memcontrol: drop mappedtodisk from cache folio flag sanity check

[Konstantin Khorenko]

The commit is pushed to "branch-rh10-6.12.0-211.16.1.12.x.vz10-ovz" and will appear at git at bitbucket.org:openvz/vzkernel.git
after rh10-6.12.0-211.16.1.12.4.vz10
------>
commit ab4eae7b155fcf8d94b09f24682b1dcad4fde6d7
Author: Pavel Tikhomirov <ptikhomirov at virtuozzo.com>
Date:   Fri Jun 19 12:04:06 2026 +0200

    mm/memcontrol: drop mappedtodisk from cache folio flag sanity check
    
    PG_mappedtodisk is a normal flag for file page cache folios, so it does
    not belong in the WARN_ON listing flags incompatible with a cache charge.
    
    https://virtuozzo.atlassian.net/browse/VSTOR-134021
    Fixes: 0ad1e82744aba ("mm: Memory cgroup page cache limit")
    Feature: mm: Memory cgroup page cache limit
    Reported-by: Konstantin Khorenko <khorenko at virtuozzo.com>
    Signed-off-by: Pavel Tikhomirov <ptikhomirov at virtuozzo.com>
---
 mm/memcontrol.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index c6c45d4351dd0..6301319529ee0 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5661,7 +5661,7 @@ void mem_cgroup_replace_folio(struct folio *old, struct folio *new)
 		 */
 		WARN_ON(folio_test_slab(new) || folio_test_swapcache(new)  ||
 			folio_test_anon(new) || folio_test_swapbacked(new) ||
-			folio_test_ksm(new)  || folio_test_mappedtodisk(new));
+			folio_test_ksm(new));
 	}
 
 	css_get(&memcg->css);