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riscv: mm: Define MAX_POSSIBLE_PHYSMEM_BITS for zsmalloc

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This definition is used by zsmalloc to optimize memory allocation. On
riscv64, it is the same as MAX_PHYSMEM_BITS from asm/sparsemem.h, but
that definition depends on CONFIG_SPARSEMEM. The correct definition is
already provided for riscv32.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Link: https://lore.kernel.org/r/20251015233327.3885003-1-samuel.holland@sifive.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Samuel Holland 2025-10-15 16:33:24 -07:00 committed by Paul Walmsley
parent 223bfc4d40
commit 5898fc01ff
1 changed files with 2 additions and 0 deletions
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2
arch/riscv/include/asm/pgtable-64.h
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@ -69,6 +69,8 @@ typedef struct {
#define PTRS_PER_PMD (PAGE_SIZE / sizeof(pmd_t))
#define MAX_POSSIBLE_PHYSMEM_BITS 56
/*
* rv64 PTE format:
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