linux-kernel - [PATCH 4/4] m68k: mm: Convert pointer table macros to use ptdescs

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Message-ID: <20250611001255.527952-5-vishal.moola@gmail.com>
Date: Tue, 10 Jun 2025 17:12:55 -0700
From: "Vishal Moola (Oracle)" <vishal.moola@...il.com>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: linux-m68k@...ts.linux-m68k.org,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Vishal Moola (Oracle)" <vishal.moola@...il.com>
Subject: [PATCH 4/4] m68k: mm: Convert pointer table macros to use ptdescs

Motorola uses its pointer tables for page tables, so its macros should be
using struct ptdesc, not struct page. This removes a user of page->lru.

Signed-off-by: Vishal Moola (Oracle) <vishal.moola@...il.com>
---
 arch/m68k/mm/motorola.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index 9bd79f42abd5..492e34dc45e6 100644
--- a/arch/m68k/mm/motorola.c
+++ b/arch/m68k/mm/motorola.c
@@ -92,7 +92,7 @@ void mmu_page_dtor(void *page)
 }
 
 /* ++andreas: {get,free}_pointer_table rewritten to use unused fields from
-   struct page instead of separately kmalloced struct.  Stolen from
+   struct ptdesc instead of separately kmalloced struct.  Stolen from
    arch/sparc/mm/srmmu.c ... */
 
 typedef struct list_head ptable_desc;
@@ -103,8 +103,7 @@ static struct list_head ptable_list[3] = {
 	LIST_HEAD_INIT(ptable_list[2]),
 };
 
-#define PD_PTABLE(page) ((ptable_desc *)&(virt_to_page((void *)(page))->lru))
-#define PD_PAGE(ptable) (list_entry(ptable, struct page, lru))
+#define PD_PTABLE(ptdesc) ((ptable_desc *)&(virt_to_ptdesc((void *)(ptdesc))->pt_list))
 #define PD_PTDESC(ptable) (list_entry(ptable, struct ptdesc, pt_list))
 #define PD_MARKBITS(dp) (*(unsigned int *)&PD_PTDESC(dp)->pt_index)
 
-- 
2.49.0