Messages in this thread Patch in this message | | | From | Linus Walleij <> | Date | Tue, 08 Aug 2023 10:29:34 +0200 | Subject | [PATCH] Hexagon: Make pfn accessors statics inlines |
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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().
For compiletime resolution of __pa() we need PAGE_OFFSET which was not available to __pa() and resolved by the preprocessor wherever __pa() was used. Fix this by explicitly including <asm/mem-layout.h> where required, following the pattern of the architectures page.h file.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- arch/hexagon/include/asm/page.h | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/arch/hexagon/include/asm/page.h b/arch/hexagon/include/asm/page.h index 9c03b9965f07..b3d4a2c065be 100644 --- a/arch/hexagon/include/asm/page.h +++ b/arch/hexagon/include/asm/page.h @@ -78,6 +78,9 @@ typedef struct page *pgtable_t; #define __pgd(x) ((pgd_t) { (x) }) #define __pgprot(x) ((pgprot_t) { (x) }) +/* Needed for PAGE_OFFSET used in the macro right below */ +#include <asm/mem-layout.h> + /* * We need a __pa and a __va routine for kernel space. * MIPS says they're only used during mem_init. @@ -125,8 +128,16 @@ static inline void clear_page(void *page) */ #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) -#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 page_to_virt(page) __va(page_to_phys(page)) --- base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5 change-id: 20230808-hexagon-virt-to-pfn-457bd51a5744 Best regards, -- Linus Walleij <linus.walleij@linaro.org>
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