Commit da707a6d authored Jan 30, 2023 by Vishal Moola (Oracle) Committed by Andrew Morton Feb 13, 2023

mm/migrate: add folio_movable_ops()

folio_movable_ops() does the same as page_movable_ops() except uses folios
instead of pages.  This function will help make folio conversions in
migrate.c more readable.

Link: https://lkml.kernel.org/r/20230130214352.40538-3-vishal.moola@gmail.com


Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

parent 3c1ea2c7

include/linux/migrate.h

+9 −0

Original line number	Diff line number	Diff line
		@@ -122,6 +122,15 @@ static inline bool folio_test_movable(struct folio *folio)
		return PageMovable(&folio->page);
		}

		static inline
		const struct movable_operations folio_movable_ops(struct folio folio)
		{
		VM_BUG_ON(!__folio_test_movable(folio));

		return (const struct movable_operations *)
		((unsigned long)folio->mapping - PAGE_MAPPING_MOVABLE);
		}

		static inline
		const struct movable_operations page_movable_ops(struct page page)
		{

mm/migrate.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -990,7 +990,7 @@ static int move_to_new_folio(struct folio dst, struct folio src,
		goto out;
		}

		mops = page_movable_ops(&src->page);
		mops = folio_movable_ops(src);
		rc = mops->migrate_page(&dst->page, &src->page, mode);
		WARN_ON_ONCE(rc == MIGRATEPAGE_SUCCESS &&
		!folio_test_isolated(src));