diff mbox series

[v3,3/4] mm/memory: convert do_shared_fault() to folios

Message ID 20230706163847.403202-3-sidhartha.kumar@oracle.com (mailing list archive)
State New
Headers show
Series [v3,1/4] mm/memory: convert do_page_mkwrite() to use folios | expand

Commit Message

Sidhartha Kumar July 6, 2023, 4:38 p.m. UTC 
Saves three implicit calls to compound_head().

Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
v2:
	 - move folio initialization after __do_fault()
 mm/memory.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

Comments

zhangpeng (AS) July 7, 2023, 10:30 a.m. UTC | #1 
On 2023/7/7 0:38, Sidhartha Kumar wrote:

> Saves three implicit calls to compound_head().
>
> Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>

Reviewed-by: ZhangPeng<zhangpeng362@huawei.com>
diff mbox series

Patch

diff --git a/mm/memory.c b/mm/memory.c
index 673b9fa67d0d7..a59b10e534c07 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4607,21 +4607,24 @@  static vm_fault_t do_shared_fault(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;
 	vm_fault_t ret, tmp;
+	struct folio *folio;
 
 	ret = __do_fault(vmf);
 	if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE | VM_FAULT_RETRY)))
 		return ret;
 
+	folio = page_folio(vmf->page);
+
 	/*
 	 * Check if the backing address space wants to know that the page is
 	 * about to become writable
 	 */
 	if (vma->vm_ops->page_mkwrite) {
-		unlock_page(vmf->page);
+		folio_unlock(folio);
 		tmp = do_page_mkwrite(vmf);
 		if (unlikely(!tmp ||
 				(tmp & (VM_FAULT_ERROR | VM_FAULT_NOPAGE)))) {
-			put_page(vmf->page);
+			folio_put(folio);
 			return tmp;
 		}
 	}
@@ -4629,8 +4632,8 @@  static vm_fault_t do_shared_fault(struct vm_fault *vmf)
 	ret |= finish_fault(vmf);
 	if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE |
 					VM_FAULT_RETRY))) {
-		unlock_page(vmf->page);
-		put_page(vmf->page);
+		folio_unlock(folio);
+		folio_put(folio);
 		return ret;
 	}