m68k: mm: Convert init_pointer_table() to use ptdescs

Motorola uses init_pointer_table() for page tables, so it should be using
struct ptdesc, not struct page.

This helps us prepare to allocate ptdescs as their own memory
descriptor, and prepares to remove a user of page->lru.

Signed-off-by: "Vishal Moola (Oracle)" <vishal.moola@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/20250611001255.527952-4-vishal.moola@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index 6d655ef349b4be5b021d394cbfac2f42830c0897..8b73807dca90f83db287979a6f23ba24a286db3b 100644 (file)
--- a/arch/m68k/mm/motorola.c
+++ b/arch/m68k/mm/motorola.c
@@ -121,10 +121,10 @@ void __init init_pointer_table(void *table, int type)
 {
        ptable_desc *dp;
        unsigned long ptable = (unsigned long)table;
-       unsigned long page = ptable & PAGE_MASK;
-       unsigned int mask = 1U << ((ptable - page)/ptable_size(type));
+       unsigned long pt_addr = ptable & PAGE_MASK;
+       unsigned int mask = 1U << ((ptable - pt_addr)/ptable_size(type));
 
-       dp = PD_PTABLE(page);
+       dp = PD_PTABLE(pt_addr);
        if (!(PD_MARKBITS(dp) & mask)) {
                PD_MARKBITS(dp) = ptable_mask(type);
                list_add(dp, &ptable_list[type]);
@@ -133,9 +133,9 @@ void __init init_pointer_table(void *table, int type)
        PD_MARKBITS(dp) &= ~mask;
        pr_debug("init_pointer_table: %lx, %x\n", ptable, PD_MARKBITS(dp));
 
-       /* unreserve the page so it's possible to free that page */
-       __ClearPageReserved(PD_PAGE(dp));
-       init_page_count(PD_PAGE(dp));
+       /* unreserve the ptdesc so it's possible to free that ptdesc */
+       __ClearPageReserved(ptdesc_page(PD_PTDESC(dp)));
+       init_page_count(ptdesc_page(PD_PTDESC(dp)));
 
        return;
 }