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SubjectRe: [PATCH 3/3] mm, arch: add generic implementation of pfn_valid() for FLATMEM
On Wed, Jan 25, 2023 at 09:07:57PM +0200, Mike Rapoport wrote:
> From: "Mike Rapoport (IBM)" <rppt@kernel.org>
>
> Every architecture that supports FLATMEM memory model defines its own
> version of pfn_valid() that essentially compares a pfn to max_mapnr.
>
> Use mips/powerpc version implemented as static inline as a generic
> implementation of pfn_valid() and drop its per-architecture definitions
>
> Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
> ---
> arch/alpha/include/asm/page.h | 4 ----
> arch/arc/include/asm/page.h | 1 -
> arch/csky/include/asm/page.h | 1 -
> arch/hexagon/include/asm/page.h | 1 -
> arch/ia64/include/asm/page.h | 4 ----
> arch/loongarch/include/asm/page.h | 13 -------------
> arch/m68k/include/asm/page_no.h | 2 --
> arch/microblaze/include/asm/page.h | 1 -
> arch/mips/include/asm/page.h | 13 -------------
> arch/nios2/include/asm/page.h | 9 ---------
> arch/openrisc/include/asm/page.h | 2 --
> arch/parisc/include/asm/page.h | 4 ----
> arch/powerpc/include/asm/page.h | 9 ---------
> arch/riscv/include/asm/page.h | 5 -----
> arch/sh/include/asm/page.h | 3 ---
> arch/sparc/include/asm/page_32.h | 1 -
> arch/um/include/asm/page.h | 1 -
> arch/x86/include/asm/page_32.h | 4 ----
> arch/x86/include/asm/page_64.h | 4 ----
> arch/xtensa/include/asm/page.h | 2 --
> include/asm-generic/memory_model.h | 12 ++++++++++++
> include/asm-generic/page.h | 2 --
> 22 files changed, 12 insertions(+), 86 deletions(-)
>
[...]
> diff --git a/arch/openrisc/include/asm/page.h b/arch/openrisc/include/asm/page.h
> index aab6e64d6db4..52b0d7e76446 100644
> --- a/arch/openrisc/include/asm/page.h
> +++ b/arch/openrisc/include/asm/page.h
> @@ -80,8 +80,6 @@ typedef struct page *pgtable_t;
>
> #define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
>
> -#define pfn_valid(pfn) ((pfn) < max_mapnr)
> -
> #define virt_addr_valid(kaddr) (pfn_valid(virt_to_pfn(kaddr)))
>
> #endif /* __ASSEMBLY__ */

For OpenRISC

Acked-by: Stafford Horne <shorne@gmail.com>

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