m68k: remove use of page->index

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

Link: https://lkml.kernel.org/r/20250516151332.3705351-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index 6ab3ef39ba7a96fcfd75b2a4aea2f9f369554516..745bd575dcfa61494e0ace5b78bffd509b08065e 100644 (file)
--- 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 */