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mm/ksm: replace set_page_stable_node by folio_set_stable_node

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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: Alex Shi (tencent) <alexs@kernel.org>
Reviewed-by: David 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: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Alex Shi (tencent) 2024-04-11 14:17:11 +08:00 committed by Andrew Morton
parent 85b67b0104
commit 452e862f43
1 changed files with 3 additions and 9 deletions
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12
mm/ksm.c
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@ -1094,17 +1094,11 @@ static inline struct ksm_stable_node *page_stable_node(struct page *page)
return folio_stable_node(page_folio(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, static inline void folio_set_stable_node(struct folio *folio,
struct ksm_stable_node *stable_node) 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 #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: * PageAnon+anon_vma to PageKsm+NULL stable_node:
* stable_tree_insert() will update 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); mark_page_accessed(page);
/* /*
* Page reclaim just frees a clean page with no dirty * Page reclaim just frees a clean page with no dirty