Commit f39b6e2d authored by Alex Shi (tencent)'s avatar Alex Shi (tencent) Committed by Andrew Morton
Browse files

mm/ksm: use folio in remove_rmap_item_from_tree 

To save 2 compound_head calls.

Link: https://lkml.kernel.org/r/20240411061713.1847574-3-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 b91f9472

mm/ksm.c

+5 −5
Original line number Diff line number Diff line
@@ -1006,16 +1006,16 @@ static void remove_rmap_item_from_tree(struct ksm_rmap_item *rmap_item) 
{

	if (rmap_item->address & STABLE_FLAG) {

		struct ksm_stable_node *stable_node;

		struct page *page;

		struct folio *folio;



		stable_node = rmap_item->head;

		page = get_ksm_page(stable_node, GET_KSM_PAGE_LOCK);

		if (!page)

		folio = ksm_get_folio(stable_node, GET_KSM_PAGE_LOCK);

		if (!folio)

			goto out;



		hlist_del(&rmap_item->hlist);

		unlock_page(page);

		put_page(page);

		folio_unlock(folio);

		folio_put(folio);



		if (!hlist_empty(&stable_node->hlist))

			ksm_pages_sharing--;