mm/pagewalk: drop nth_page() usage within folio in folio_walk_start()

It's no longer required to use nth_page() within a folio, so let's just
drop the nth_page() in folio_walk_start().

Link: https://lkml.kernel.org/r/20250901150359.867252-18-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/pagewalk.c b/mm/pagewalk.c
index c6753d370ff4e57374fb8d89c49c68abbdf05edf..9e4225e5fcf5c5c22fdac16b6a0bc73c8789b75d 100644 (file)
--- a/mm/pagewalk.c
+++ b/mm/pagewalk.c
@@ -1004,7 +1004,7 @@ not_found:
 found:
        if (expose_page)
                /* Note: Offset from the mapped page, not the folio start. */
-               fw->page = nth_page(page, (addr & (entry_size - 1)) >> PAGE_SHIFT);
+               fw->page = page + ((addr & (entry_size - 1)) >> PAGE_SHIFT);
        else
                fw->page = NULL;
        fw->ptl = ptl;