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From:   Mark-PK Tsai <mark-pk.tsai@mediatek.com>
To:     <rppt@kernel.org>
CC:     <akpm@linux-foundation.org>,
        <linux-arm-kernel@lists.infradead.org>,
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Subject: Re: [PATCH v3 0/4] memblock, arm: fixes for freeing of the memory map
Date:   Thu, 11 Nov 2021 15:33:29 +0800
Message-ID: <20211111073329.13095-1-mark-pk.tsai@mediatek.com>
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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!