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. In order to do this we move the virt_to_phys() and below the definition of the __pa() and __va() macros so it compiles. The macro version was also able to do recursive symbol resolution. Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx> --- arch/arc/include/asm/page.h | 21 ++++++++++++--------- arch/arc/include/asm/pgtable-levels.h | 2 +- 2 files changed, 13 insertions(+), 10 deletions(-) diff --git a/arch/arc/include/asm/page.h b/arch/arc/include/asm/page.h index 02b53ad811fb..def0dfb95b43 100644 --- a/arch/arc/include/asm/page.h +++ b/arch/arc/include/asm/page.h @@ -84,15 +84,6 @@ typedef struct { typedef struct page *pgtable_t; -/* - * Use virt_to_pfn with caution: - * If used in pte or paddr related macros, it could cause truncation - * in PAE40 builds - * As a rule of thumb, only use it in helpers starting with virt_ - * You have been warned ! - */ -#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) - /* * When HIGHMEM is enabled we have holes in the memory map so we need * pfn_valid() that takes into account the actual extents of the physical @@ -122,6 +113,18 @@ extern int pfn_valid(unsigned long pfn); #define __pa(vaddr) ((unsigned long)(vaddr)) #define __va(paddr) ((void *)((unsigned long)(paddr))) +/* + * Use virt_to_pfn with caution: + * If used in pte or paddr related macros, it could cause truncation + * in PAE40 builds + * As a rule of thumb, only use it in helpers starting with virt_ + * You have been warned ! + */ +static inline unsigned long virt_to_pfn(const void *kaddr) +{ + return __pa(kaddr) >> PAGE_SHIFT; +} + #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) #define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr)) diff --git a/arch/arc/include/asm/pgtable-levels.h b/arch/arc/include/asm/pgtable-levels.h index fc417c75c24d..86e148226463 100644 --- a/arch/arc/include/asm/pgtable-levels.h +++ b/arch/arc/include/asm/pgtable-levels.h @@ -159,7 +159,7 @@ #define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0) #define pmd_page_vaddr(pmd) (pmd_val(pmd) & PAGE_MASK) #define pmd_pfn(pmd) ((pmd_val(pmd) & PAGE_MASK) >> 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)) #define set_pmd(pmdp, pmd) (*(pmdp) = pmd) #define pmd_pgtable(pmd) ((pgtable_t) pmd_page(pmd)) -- 2.34.1