[PATCH 02/12] m68k: Pass a pointer to virt_to_pfn() virt_to_page()

Linus Walleij
2023-05-11T12:00:08Z

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.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v1->v2:
- Add an extra parens around the page argument to the
PD_PTABLE() macro, as is normally required.
---
arch/m68k/mm/motorola.c | 4 ++--
arch/m68k/mm/sun3mmu.c | 2 +-
arch/m68k/sun3/dvma.c | 2 +-
arch/m68k/sun3x/dvma.c | 2 +-
4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index 911301224078..c75984e2d86b 100644
--- a/arch/m68k/mm/motorola.c
+++ b/arch/m68k/mm/motorola.c
@@ -102,7 +102,7 @@ static struct list_head ptable_list[2] = {
LIST_HEAD_INIT(ptable_list[1]),
};

-#define PD_PTABLE(page) ((ptable_desc *)&(virt_to_page(page)->lru))
+#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)

@@ -201,7 +201,7 @@ int free_pointer_table(void *table, int type)
list_del(dp);
mmu_page_dtor((void *)page);
if (type == TABLE_PTE)
- pgtable_pte_page_dtor(virt_to_page(page));
+ pgtable_pte_page_dtor(virt_to_page((void *)page));
free_page (page);
return 1;
} else if (ptable_list[type].next != dp) {
diff --git a/arch/m68k/mm/sun3mmu.c b/arch/m68k/mm/sun3mmu.c
index b619d0d4319c..c5e6a23e0262 100644
--- a/arch/m68k/mm/sun3mmu.c
+++ b/arch/m68k/mm/sun3mmu.c
@@ -75,7 +75,7 @@ void __init paging_init(void)
/* now change pg_table to kernel virtual addresses */
pg_table = (pte_t *) __va ((unsigned long) pg_table);
for (i=0; i<PTRS_PER_PTE; ++i, ++pg_table) {
- pte_t pte = pfn_pte(virt_to_pfn(address), PAGE_INIT);
+ pte_t pte = pfn_pte(virt_to_pfn((void *)address), PAGE_INIT);
if (address >= (unsigned long)high_memory)
pte_val (pte) = 0;
set_pte (pg_table, pte);
diff --git a/arch/m68k/sun3/dvma.c b/arch/m68k/sun3/dvma.c
index f15ff16b9997..83fcae6a0e79 100644
--- a/arch/m68k/sun3/dvma.c
+++ b/arch/m68k/sun3/dvma.c
@@ -29,7 +29,7 @@ static unsigned long dvma_page(unsigned long kaddr, unsigned long vaddr)
j = *(volatile unsigned long *)kaddr;
*(volatile unsigned long *)kaddr = j;

- ptep = pfn_pte(virt_to_pfn(kaddr), PAGE_KERNEL);
+ ptep = pfn_pte(virt_to_pfn((void *)kaddr), PAGE_KERNEL);
pte = pte_val(ptep);
// pr_info("dvma_remap: addr %lx -> %lx pte %08lx\n", kaddr, vaddr, pte);
if(ptelist[(vaddr & 0xff000) >> PAGE_SHIFT] != pte) {
diff --git a/arch/m68k/sun3x/dvma.c b/arch/m68k/sun3x/dvma.c
index 08bb92113026..a6034ba05845 100644
--- a/arch/m68k/sun3x/dvma.c
+++ b/arch/m68k/sun3x/dvma.c
@@ -125,7 +125,7 @@ inline int dvma_map_cpu(unsigned long kaddr,
do {
pr_debug("mapping %08lx phys to %08lx\n",
__pa(kaddr), vaddr);
- set_pte(pte, pfn_pte(virt_to_pfn(kaddr),
+ set_pte(pte, pfn_pte(virt_to_pfn((void *)kaddr),
PAGE_KERNEL));
pte++;
kaddr += PAGE_SIZE;

--
2.34.1