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Date:   Wed, 23 Jun 2021 09:12:32 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Kefeng Wang <wangkefeng.wang@huawei.com>
Cc:     Jing Xiangfeng <jingxiangfeng@huawei.com>,
        Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
        catalin.marinas@arm.com, will@kernel.org,
        akpm@linux-foundation.org, guohanjun@huawei.com,
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        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org, Li Huafei <lihuafei1@huawei.com>
Subject: Re: [PATCH stable v5.10 0/7] arm64: Default to 32-bit wide ZONE_DMA
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On Wed, Jun 23, 2021 at 02:59:59PM +0800, Kefeng Wang wrote:
> Hi Greg,
> 
> There are two more patches about the ZONE_DMA[32] changes,

What ZONE_DMA changes?

> especially the
> second one, both them need be backported, thanks.

Backported to where?

> 791ab8b2e3db - arm64: Ignore any DMA offsets in the max_zone_phys()
> calculation
> 2687275a5843 - arm64: Force NO_BLOCK_MAPPINGS if crashkernel reservation is
> required

Have you tried these patches?  Where do they need to be applied to?

confused,

greg k-h