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arm64: memory: Make virt_to_pfn() a static inline

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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.

Since arm64 is using <asm-generic/memory_model.h> to provide
__phys_to_pfn() we need to move the inclusion of that header
up, so we can resolve the static inline at compile time.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2022-05-30 10:46:39 +02:00
parent a9ff696160
commit c94b1a012f
1 changed files with 8 additions and 1 deletions
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9
arch/arm64/include/asm/memory.h
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@ -331,6 +331,14 @@ static inline void *phys_to_virt(phys_addr_t x)
return (void *)(__phys_to_virt(x));
}
/* Needed already here for resolving __phys_to_pfn() in virt_to_pfn() */
#include <asm-generic/memory_model.h>
static inline unsigned long virt_to_pfn(const void *kaddr)
{
return __phys_to_pfn(virt_to_phys(kaddr));
}
/*
* Drivers should NOT use these either.
*/
@ -339,7 +347,6 @@ static inline void *phys_to_virt(phys_addr_t x)
#define __pa_nodebug(x) __virt_to_phys_nodebug((unsigned long)(x))
#define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x)))
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
#define virt_to_pfn(x) __phys_to_pfn(__virt_to_phys((unsigned long)(x)))
#define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x))
/*