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Suggested-by: David Hildenbrand Signed-off-by: Mingzhe Yang Signed-off-by: Lance Yang --- include/linux/page-flags.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index d3909cb1e576..6bd9b9043976 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -1232,6 +1232,8 @@ static inline int folio_has_private(const struct folio *folio) static inline bool folio_test_large_maybe_mapped_shared(const struct folio *folio) { + /* This function should never be called without CONFIG_MM_ID enabled. */ + BUILD_BUG_ON(!IS_ENABLED(CONFIG_MM_ID)); return test_bit(FOLIO_MM_IDS_SHARED_BITNUM, &folio->_mm_ids); } #undef PF_ANY -- 2.49.0