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m68k: mm: Convert free_pointer_table() to use ptdescs

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Motorola uses free_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/20250611001255.527952-3-vishal.moola@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Vishal Moola (Oracle) 2025-06-10 17:12:53 -07:00 committed by Geert Uytterhoeven
parent 72fe6dafaa
commit 5bea64689d
1 changed files with 6 additions and 7 deletions
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13
arch/m68k/mm/motorola.c
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@ -202,21 +202,20 @@ int free_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)
panic ("table already free!");
PD_MARKBITS (dp) |= mask;
if (PD_MARKBITS(dp) == ptable_mask(type)) {
/* all tables in page are free, free page */
/* all tables in ptdesc are free, free ptdesc */
list_del(dp);
mmu_page_dtor((void *)page);
pagetable_dtor(virt_to_ptdesc((void *)page));
free_page (page);
mmu_page_dtor((void *)pt_addr);
pagetable_dtor_free(virt_to_ptdesc((void *)pt_addr));
return 1;
} else if (ptable_list[type].next != dp) {
/*