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Message-Id: <20230503-virt-to-pfn-v6-4-rc1-v2-2-0948d38bddab@linaro.org>
Date: Mon, 22 May 2023 09:00:37 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: Andrew Morton <akpm@...ux-foundation.org>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Vineet Gupta <vgupta@...nel.org>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>, Arnd Bergmann <arnd@...db.de>,
Russell King <linux@...linux.org.uk>,
Greg Ungerer <gerg@...ux-m68k.org>
Cc: linux-mm@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-m68k@...ts.linux-m68k.org,
linux-snps-arc@...ts.infradead.org, linux-fsdevel@...r.kernel.org,
linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
linux-arm-kernel@...ts.infradead.org, linux-arch@...r.kernel.org,
Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH v2 02/12] m68k: Pass a pointer to virt_to_pfn()
virt_to_page()
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@...ux-m68k.org>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
ChangeLog v2->v3:
- Fix the sun3 pgtable macro to not cast to unsigned long.
- Make a similar change to the ColdFire include.
ChangeLog v1->v2:
- Add an extra parens around the page argument to the
PD_PTABLE() macro, as is normally required.
---
arch/m68k/include/asm/mcf_pgtable.h | 4 ++--
arch/m68k/include/asm/sun3_pgtable.h | 4 ++--
arch/m68k/mm/mcfmmu.c | 3 ++-
arch/m68k/mm/motorola.c | 4 ++--
arch/m68k/mm/sun3mmu.c | 2 +-
arch/m68k/sun3/dvma.c | 2 +-
arch/m68k/sun3x/dvma.c | 2 +-
7 files changed, 11 insertions(+), 10 deletions(-)
diff --git a/arch/m68k/include/asm/mcf_pgtable.h b/arch/m68k/include/asm/mcf_pgtable.h
index d97fbb812f63..f67c59336ab4 100644
--- a/arch/m68k/include/asm/mcf_pgtable.h
+++ b/arch/m68k/include/asm/mcf_pgtable.h
@@ -115,8 +115,8 @@ static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp)
pgd_val(*pgdp) = virt_to_phys(pmdp);
}
-#define __pte_page(pte) ((unsigned long) (pte_val(pte) & PAGE_MASK))
-#define pmd_page_vaddr(pmd) ((unsigned long) (pmd_val(pmd)))
+#define __pte_page(pte) (__va (pte_val(pte) & PAGE_MASK))
+#define pmd_page_vaddr(pmd) (__va (pmd_val(pmd)))
static inline int pte_none(pte_t pte)
{
diff --git a/arch/m68k/include/asm/sun3_pgtable.h b/arch/m68k/include/asm/sun3_pgtable.h
index e582b0484a55..f428f73125d5 100644
--- a/arch/m68k/include/asm/sun3_pgtable.h
+++ b/arch/m68k/include/asm/sun3_pgtable.h
@@ -91,7 +91,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
#define pmd_set(pmdp,ptep) do {} while (0)
#define __pte_page(pte) \
-((unsigned long) __va ((pte_val (pte) & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT))
+(__va ((pte_val (pte) & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT))
static inline unsigned long pmd_page_vaddr(pmd_t pmd)
{
@@ -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))
static inline int pmd_none2 (pmd_t *pmd) { return !pmd_val (*pmd); }
diff --git a/arch/m68k/mm/mcfmmu.c b/arch/m68k/mm/mcfmmu.c
index 70aa0979e027..278e85fcecd4 100644
--- a/arch/m68k/mm/mcfmmu.c
+++ b/arch/m68k/mm/mcfmmu.c
@@ -69,7 +69,8 @@ void __init paging_init(void)
/* now change pg_table to kernel virtual addresses */
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;
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
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