Commit 2045a3b8911b ("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@xxxxxxxxxxx>
---
Separate the patch out based on the discussion:
https://lore.kernel.org/linux-arm-kernel/20241209094227.1529977-3-quic_zhenhuah@xxxxxxxxxxx/T/#m41d49cd91b348ecfe2c37c4b3c0911180426934e
arch/arm64/mm/mmu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 9afeb35673a3..50a22c63f450 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -1172,7 +1172,8 @@ 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,
--
2.25.1
