+ mm-memory-convert-wp_page_shared-to-use-folios.patch added to mm-unstable branch

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The patch titled
     Subject: mm/memory: convert wp_page_shared() to use folios
has been added to the -mm mm-unstable branch.  Its filename is
     mm-memory-convert-wp_page_shared-to-use-folios.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memory-convert-wp_page_shared-to-use-folios.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Subject: mm/memory: convert wp_page_shared() to use folios
Date: Sun, 2 Jul 2023 22:58:48 -0700

Saves five implicit calls to compound_head().

Link: https://lkml.kernel.org/r/20230703055850.227169-2-sidhartha.kumar@xxxxxxxxxx
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Reviewed-by: ZhangPeng <zhangpeng362@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/memory.c |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

--- a/mm/memory.c~mm-memory-convert-wp_page_shared-to-use-folios
+++ a/mm/memory.c
@@ -3287,8 +3287,9 @@ static vm_fault_t wp_page_shared(struct
 {
 	struct vm_area_struct *vma = vmf->vma;
 	vm_fault_t ret = 0;
+	struct folio *folio = page_folio(vmf->page);
 
-	get_page(vmf->page);
+	folio_get(folio);
 
 	if (vma->vm_ops && vma->vm_ops->page_mkwrite) {
 		vm_fault_t tmp;
@@ -3297,21 +3298,21 @@ static vm_fault_t wp_page_shared(struct
 		tmp = do_page_mkwrite(vmf);
 		if (unlikely(!tmp || (tmp &
 				      (VM_FAULT_ERROR | VM_FAULT_NOPAGE)))) {
-			put_page(vmf->page);
+			folio_put(folio);
 			return tmp;
 		}
 		tmp = finish_mkwrite_fault(vmf);
 		if (unlikely(tmp & (VM_FAULT_ERROR | VM_FAULT_NOPAGE))) {
-			unlock_page(vmf->page);
-			put_page(vmf->page);
+			folio_unlock(folio);
+			folio_put(folio);
 			return tmp;
 		}
 	} else {
 		wp_page_reuse(vmf);
-		lock_page(vmf->page);
+		folio_lock(folio);
 	}
 	ret |= fault_dirty_shared_page(vmf);
-	put_page(vmf->page);
+	folio_put(folio);
 
 	return ret;
 }
_

Patches currently in -mm which might be from sidhartha.kumar@xxxxxxxxxx are

mm-increase-usage-of-folio_next_index-helper.patch
mm-memory-convert-do_page_mkwrite-to-use-folios.patch
mm-memory-convert-wp_page_shared-to-use-folios.patch
mm-memory-convert-do_shared_fault-to-folios.patch
mm-memory-convert-do_read_fault-to-use-folios.patch




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