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asm-generic: provide generic page_to_phys and phys_to_page implementations

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page_to_phys is duplicated by all architectures, and from some strange
reason placed in <asm/io.h> where it doesn't fit at all.

phys_to_page is only provided by a few architectures despite having a lot
of open coded users.

Provide generic versions in <asm-generic/memory_model.h> to make these
helpers more easily usable.

Note with this patch powerpc loses the CONFIG_DEBUG_VIRTUAL pfn_valid
check.  It will be added back in a generic version later.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Christoph Hellwig
2024-10-23 07:36:36 +02:00
committed by Arnd Bergmann
parent 6f043e7574
commit c5c3238d9b
22 changed files with 3 additions and 71 deletions
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3
arch/riscv/include/asm/page.h
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@@ -194,9 +194,6 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x);
#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
#define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x))
unsigned long kaslr_offset(void);