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SubjectRe: [PATCH v3 0/4] memblock, arm: fixes for freeing of the memory map
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Hi,

The lts kernel also have this issue. (we use 5.4-lts kernel.)
Currently we patch our custom kernel to select CONFIG_HOLES_IN_ZONE for arch arm.
But I think the formal solution should backport to lts.

Would you help to backport this patch series? (including the below commit)

(024591f9a6e0 arm: ioremap: don't abuse pfn_valid() to check if pfn is in RAM)

Thanks!

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