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From:   David Hildenbrand <david@redhat.com>
To:     linux-kernel@vger.kernel.org
Cc:     linux-mm@kvack.org, David Hildenbrand <david@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        "Matthew Wilcox (Oracle)" <willy@infradead.org>,
        Hugh Dickins <hughd@google.com>,
        Ryan Roberts <ryan.roberts@arm.com>,
        Yin Fengwei <fengwei.yin@intel.com>,
        Mike Kravetz <mike.kravetz@oracle.com>,
        Muchun Song <muchun.song@linux.dev>,
        Peter Xu <peterx@redhat.com>
Subject: [PATCH RFC 25/39] mm/huge_memory: page_remove_rmap() -> folio_remove_rmap_pmd()
Date:   Mon,  4 Dec 2023 15:21:32 +0100
Message-ID: <20231204142146.91437-26-david@redhat.com>
In-Reply-To: <20231204142146.91437-1-david@redhat.com>
References: <20231204142146.91437-1-david@redhat.com>
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Let's convert zap_huge_pmd() and set_pmd_migration_entry(). While at it,
perform some more folio conversion.

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 mm/huge_memory.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 332cb6cf99f38..9376c28b0ad29 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1721,7 +1721,7 @@ int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma,
 
 		if (pmd_present(orig_pmd)) {
 			page = pmd_page(orig_pmd);
-			page_remove_rmap(page, vma, true);
+			folio_remove_rmap_pmd(page_folio(page), page, vma);
 			VM_BUG_ON_PAGE(page_mapcount(page) < 0, page);
 			VM_BUG_ON_PAGE(!PageHead(page), page);
 		} else if (thp_migration_supported()) {
@@ -2134,12 +2134,13 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
 			page = pfn_swap_entry_to_page(entry);
 		} else {
 			page = pmd_page(old_pmd);
-			if (!PageDirty(page) && pmd_dirty(old_pmd))
-				set_page_dirty(page);
-			if (!PageReferenced(page) && pmd_young(old_pmd))
-				SetPageReferenced(page);
-			page_remove_rmap(page, vma, true);
-			put_page(page);
+			folio = page_folio(page);
+			if (!folio_test_dirty(folio) && pmd_dirty(old_pmd))
+				folio_set_dirty(folio);
+			if (!folio_test_referenced(folio) && pmd_young(old_pmd))
+				folio_set_referenced(folio);
+			folio_remove_rmap_pmd(folio, page, vma);
+			folio_put(folio);
 		}
 		add_mm_counter(mm, mm_counter_file(page), -HPAGE_PMD_NR);
 		return;
@@ -2294,7 +2295,7 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
 	pte_unmap(pte - 1);
 
 	if (!pmd_migration)
-		page_remove_rmap(page, vma, true);
+		folio_remove_rmap_pmd(folio, page, vma);
 	if (freeze)
 		put_page(page);
 
@@ -3235,6 +3236,7 @@ late_initcall(split_huge_pages_debugfs);
 int set_pmd_migration_entry(struct page_vma_mapped_walk *pvmw,
 		struct page *page)
 {
+	struct folio *folio = page_folio(page);
 	struct vm_area_struct *vma = pvmw->vma;
 	struct mm_struct *mm = vma->vm_mm;
 	unsigned long address = pvmw->address;
@@ -3250,14 +3252,14 @@ int set_pmd_migration_entry(struct page_vma_mapped_walk *pvmw,
 	pmdval = pmdp_invalidate(vma, address, pvmw->pmd);
 
 	/* See page_try_share_anon_rmap(): invalidate PMD first. */
-	anon_exclusive = PageAnon(page) && PageAnonExclusive(page);
+	anon_exclusive = folio_test_anon(folio) && PageAnonExclusive(page);
 	if (anon_exclusive && page_try_share_anon_rmap(page)) {
 		set_pmd_at(mm, address, pvmw->pmd, pmdval);
 		return -EBUSY;
 	}
 
 	if (pmd_dirty(pmdval))
-		set_page_dirty(page);
+		folio_set_dirty(folio);
 	if (pmd_write(pmdval))
 		entry = make_writable_migration_entry(page_to_pfn(page));
 	else if (anon_exclusive)
@@ -3274,8 +3276,8 @@ int set_pmd_migration_entry(struct page_vma_mapped_walk *pvmw,
 	if (pmd_uffd_wp(pmdval))
 		pmdswp = pmd_swp_mkuffd_wp(pmdswp);
 	set_pmd_at(mm, address, pvmw->pmd, pmdswp);
-	page_remove_rmap(page, vma, true);
-	put_page(page);
+	folio_remove_rmap_pmd(folio, page, vma);
+	folio_put(folio);
 	trace_set_migration_pmd(address, pmd_val(pmdswp));
 
 	return 0;
-- 
2.41.0