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mm/page_alloc.c: calc the right pfn if page size is not 4K

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Previous 0x100000 is used to check the 4G limit in
find_zone_movable_pfns_for_nodes().  This is right in x86 because the page
size can only be 4K.  But 16K and 64K are available in arm64.  So replace
it with PHYS_PFN(SZ_4G).

Link: https://lkml.kernel.org/r/20220414101314.1250667-8-mawupeng1@huawei.com
Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Ma Wupeng 2022-04-28 23:16:14 -07:00 committed by akpm
parent 3c9fe8b8f5
commit aa282a157b
1 changed files with 1 additions and 1 deletions
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2
mm/page_alloc.c
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@ -7821,7 +7821,7 @@ static void __init find_zone_movable_pfns_for_nodes(void)
usable_startpfn = memblock_region_memory_base_pfn(r);
if (usable_startpfn < 0x100000) {
if (usable_startpfn < PHYS_PFN(SZ_4G)) {
mem_below_4gb_not_mirrored = true;
continue;
}