forked from Minki/linux
arm64: mm: update max_pfn after memory hotplug
After new memory blocks have been hotplugged, max_pfn and max_low_pfn
needs updating to reflect on new PFNs being hot added to system.
Without this patch, debug-related functions that use max_pfn such as
get_max_dump_pfn() or read_page_owner() will not work with any page in
memory that is hot-added after boot.
Fixes: 4ab2150615
("arm64: Add memory hotplug support")
Signed-off-by: Sudarshan Rajagopalan <quic_sudaraja@quicinc.com>
Signed-off-by: Chris Goldsworthy <quic_cgoldswo@quicinc.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Georgi Djakov <quic_c_gdjako@quicinc.com>
Tested-by: Georgi Djakov <quic_c_gdjako@quicinc.com>
Link: https://lore.kernel.org/r/a51a27ee7be66024b5ce626310d673f24107bcb8.1632853776.git.quic_cgoldswo@quicinc.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
parent
f8b46c4b51
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@ -1499,6 +1499,11 @@ int arch_add_memory(int nid, u64 start, u64 size,
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if (ret)
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if (ret)
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__remove_pgd_mapping(swapper_pg_dir,
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__remove_pgd_mapping(swapper_pg_dir,
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__phys_to_virt(start), size);
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__phys_to_virt(start), size);
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else {
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max_pfn = PFN_UP(start + size);
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max_low_pfn = max_pfn;
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}
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return ret;
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return ret;
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}
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}
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