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arm64: mm: Test for pmd_sect() in vmemmap_check_pmd()

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Commit 2045a3b891 ("mm/sparse-vmemmap: generalise vmemmap_populate_hugepages()")
introduces the vmemmap_check_pmd() while does not verify if the entry is a
section mapping, as is already done for Loongarch & X86.
The update includes a check for pmd_sect(). Only if pmd_sect() returns true,
further vmemmap population for the addr is skipped.

Signed-off-by: Zhenhua Huang <quic_zhenhuah@quicinc.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20250102074047.674156-1-quic_zhenhuah@quicinc.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Zhenhua Huang
2025-01-02 15:40:47 +08:00
committed by Will Deacon
parent fe2169f556
commit 9ab2601dc4
1 changed files with 2 additions and 1 deletions
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3
arch/arm64/mm/mmu.c
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@@ -1169,7 +1169,8 @@ int __meminit vmemmap_check_pmd(pmd_t *pmdp, int node,
unsigned long addr, unsigned long next)
{
vmemmap_verify((pte_t *)pmdp, node, addr, next);
return 1;
return pmd_sect(READ_ONCE(*pmdp));
}
int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,