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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.

Acked-by: Brian Cain <bcain@quicinc.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Linus Walleij 2023-11-15 14:28:15 +01:00 committed by Arnd Bergmann
parent da4382a720
commit d6e81532b1
1 changed files with 13 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

15
arch/hexagon/include/asm/page.h
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@ -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 (void *)((unsigned long)__va(pfn) << PAGE_SHIFT);
}
#define page_to_virt(page) __va(page_to_phys(page))