Commit 452e862f authored by Alex Shi (tencent)'s avatar Alex Shi (tencent) Committed by Andrew Morton
Browse files

mm/ksm: replace set_page_stable_node by folio_set_stable_node 

Only single page could be reached where we set stable node after write
protect, so use folio converted func to replace page's.  And remove the
unused func set_page_stable_node().

Link: https://lkml.kernel.org/r/20240411061713.1847574-11-alexs@kernel.org


Signed-off-by: default avatarAlex Shi (tencent) <alexs@kernel.org>
Reviewed-by: default avatarDavid Hildenbrand <david@redhat.com>
Cc: Izik Eidus <izik.eidus@ravellosystems.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 85b67b01

mm/ksm.c

+3 −9
Original line number Diff line number Diff line
@@ -1094,17 +1094,11 @@ static inline struct ksm_stable_node *page_stable_node(struct page *page) 
	return folio_stable_node(page_folio(page));

}



static inline void set_page_stable_node(struct page *page,

					struct ksm_stable_node *stable_node)

{

	VM_BUG_ON_PAGE(PageAnon(page) && PageAnonExclusive(page), page);

	page->mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM);

}



static inline void folio_set_stable_node(struct folio *folio,

					 struct ksm_stable_node *stable_node)

{

	set_page_stable_node(&folio->page, stable_node);

	VM_WARN_ON_FOLIO(folio_test_anon(folio) && PageAnonExclusive(&folio->page), folio);

	folio->mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM);

}



#ifdef CONFIG_SYSFS
@@ -1519,7 +1513,7 @@ static int try_to_merge_one_page(struct vm_area_struct *vma, 
			 * PageAnon+anon_vma to PageKsm+NULL stable_node:

			 * stable_tree_insert() will update stable_node.

			 */

			set_page_stable_node(page, NULL);

			folio_set_stable_node(page_folio(page), NULL);

			mark_page_accessed(page);

			/*

			 * Page reclaim just frees a clean page with no dirty