[PATCH 2/4] mm/memory: convert wp_page_shared() to use folios

Sidhartha Kumar
2023-07-03T05:59:47Z

Saves five implicit calls to compound_head().

Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
---
mm/memory.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index 098fac2f5efc0..93480e846ace6 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3286,8 +3286,9 @@ static vm_fault_t wp_page_shared(struct vm_fault *vmf)
{
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;
@@ -3296,21 +3297,21 @@ static vm_fault_t wp_page_shared(struct vm_fault *vmf)
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;
}
--
2.41.0