[PATCH] m68k: Remove use of page->index

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

Switch to using struct ptdesc to store the markbits which will
allow us to remove index from struct page.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
---
Andrew, please queue this one before "mm: rename page->index +to page->__folio_index"
Geert, there's several more changes that I'll want to make to this file,
but I don't want to do them in a rush.  I'll send you more patches
later.

 arch/m68k/mm/motorola.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index 73651e093c4d..d5afcc70a2f4 100644
--- a/arch/m68k/mm/motorola.c
+++ b/arch/m68k/mm/motorola.c
@@ -105,7 +105,8 @@ static struct list_head ptable_list[3] = {
 
 #define PD_PTABLE(page) ((ptable_desc *)&(virt_to_page((void *)(page))->lru))
 #define PD_PAGE(ptable) (list_entry(ptable, struct page, lru))
-#define PD_MARKBITS(dp) (*(unsigned int *)&PD_PAGE(dp)->index)
+#define PD_PTDESC(ptable) (list_entry(ptable, struct ptdesc, pt_list))
+#define PD_MARKBITS(dp) (*(unsigned int *)&PD_PTDESC(dp)->pt_index)
 
 static const int ptable_shift[3] = {
 	7+2, /* PGD */
-- 
2.47.2