Hi Linus,
On Tue, May 23, 2023 at 4:05 PM Linus Walleij <linus.walleij@xxxxxxxxxx> wrote:
Functions that work on a pointer to virtual memory such as
virt_to_pfn() and users of that function such as
virt_to_page() are supposed to pass a pointer to virtual
memory, ideally a (void *) or other pointer. However since
many architectures implement virt_to_pfn() as a macro,
this function becomes polymorphic and accepts both a
(unsigned long) and a (void *).
Fix up the offending calls in arch/m68k with explicit casts.
The page table include <asm/pgtable.h> will include different
variants of the defines depending on whether you build for
classic m68k, ColdFire or Sun3, so fix all variants.
Tested-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Thanks for your patch!
---
ChangeLog v2->v3:
- Fix up versioning. This is v3.
- Let Coldfire __pte_page() return a (void *) instead of __va
- Delete Coldfire pte_pagenr() which was using unsigned long
semantics from __pte_page()
You may want to mention this removal in the patch descriptin.
- Drop ill-advised change to Coldfire pmd_page_vaddr()
--- a/arch/m68k/include/asm/sun3_pgtable.h
+++ b/arch/m68k/include/asm/sun3_pgtable.h
@@ -111,7 +111,7 @@ static inline void pte_clear (struct mm_struct *mm, unsigned long addr, pte_t *p
#define pte_page(pte) virt_to_page(__pte_page(pte))
#define pmd_pfn(pmd) (pmd_val(pmd) >> PAGE_SHIFT)
-#define pmd_page(pmd) virt_to_page(pmd_page_vaddr(pmd))
+#define pmd_page(pmd) virt_to_page((void *)pmd_page_vaddr(pmd))
There's an extra space between "void" and "*".
Reviewed-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Acked-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
