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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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2
arch/s390/include/asm/page.h
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@@ -245,9 +245,7 @@ static inline unsigned long __phys_addr(unsigned long x, bool is_31bit)
#define phys_to_pfn(phys) ((phys) >> PAGE_SHIFT)
#define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
#define phys_to_page(phys) pfn_to_page(phys_to_pfn(phys))
#define phys_to_folio(phys) page_folio(phys_to_page(phys))
#define page_to_phys(page) pfn_to_phys(page_to_pfn(page))
#define folio_to_phys(page) pfn_to_phys(folio_pfn(folio))
static inline void *pfn_to_virt(unsigned long pfn)