diff mbox series

[v3,12/12] m68k/mm: Make pfn accessors static inlines

Message ID 20230503-virt-to-pfn-v6-4-rc1-v3-12-a16c19c03583@linaro.org
State New
Headers
Series arch: Make virt_to_pfn into a static inline |

Commit Message

Linus Walleij May 23, 2023, 2:05 p.m. UTC 
  Making virt_to_pfn() a static inline taking a strongly typed
(const void *) makes the contract of a passing a pointer of that
type to the function explicit and exposes any misuse of the
macro virt_to_pfn() acting polymorphic and accepting many types
such as (void *), (unitptr_t) or (unsigned long) as arguments
without warnings.

For symmetry, do the same with pfn_to_virt().

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/m68k/include/asm/page_mm.h | 11 +++++++++--
 arch/m68k/include/asm/page_no.h | 11 +++++++++--
 2 files changed, 18 insertions(+), 4 deletions(-)

Comments

Geert Uytterhoeven May 24, 2023, 10:13 a.m. UTC | #1 
On Tue, May 23, 2023 at 4:05 PM Linus Walleij <linus.walleij@linaro.org> wrote:
> Making virt_to_pfn() a static inline taking a strongly typed
> (const void *) makes the contract of a passing a pointer of that
> type to the function explicit and exposes any misuse of the
> macro virt_to_pfn() acting polymorphic and accepting many types
> such as (void *), (unitptr_t) or (unsigned long) as arguments
> without warnings.
>
> For symmetry, do the same with pfn_to_virt().
>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>

Gr{oetje,eeting}s,

                        Geert
diff mbox series

Patch

diff --git a/arch/m68k/include/asm/page_mm.h b/arch/m68k/include/asm/page_mm.h
index 3903db2e8da7..363aa0f9ba8a 100644
--- a/arch/m68k/include/asm/page_mm.h
+++ b/arch/m68k/include/asm/page_mm.h
@@ -121,8 +121,15 @@  static inline void *__va(unsigned long x)
  * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
  * of the shifts unnecessary.
  */
-#define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
-#define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)
+static inline unsigned long virt_to_pfn(const void *kaddr)
+{
+	return __pa(kaddr) >> PAGE_SHIFT;
+}
+
+static inline void *pfn_to_virt(unsigned long pfn)
+{
+	return __va(pfn << PAGE_SHIFT);
+}
 
 extern int m68k_virt_to_node_shift;
 
diff --git a/arch/m68k/include/asm/page_no.h b/arch/m68k/include/asm/page_no.h
index 060e4c0e7605..af3a10973233 100644
--- a/arch/m68k/include/asm/page_no.h
+++ b/arch/m68k/include/asm/page_no.h
@@ -19,8 +19,15 @@  extern unsigned long memory_end;
 #define __pa(vaddr)		((unsigned long)(vaddr))
 #define __va(paddr)		((void *)((unsigned long)(paddr)))
 
-#define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
-#define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)
+static inline unsigned long virt_to_pfn(const void *kaddr)
+{
+	return __pa(kaddr) >> PAGE_SHIFT;
+}
+
+static inline void *pfn_to_virt(unsigned long pfn)
+{
+	return __va(pfn << PAGE_SHIFT);
+}
 
 #define virt_to_page(addr)	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
 #define page_to_virt(page)	__va(((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET))