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Date:   Tue, 29 Dec 2020 14:31:50 +0800
From:   "Leizhen (ThunderTown)" <>
To:     Russell King - ARM Linux admin <>
CC:     Greg Kroah-Hartman <>,
        Will Deacon <>,
        Jason Cooper <>,
        Haojian Zhuang <>,
        Arnd Bergmann <>,
        linux-arm-kernel <>,
        linux-kernel <>
Subject: Re: [PATCH 1/1] ARM: LPAE: use phys_addr_t instead of unsigned long
 in outercache hooks

On 2020/12/26 20:15, Russell King - ARM Linux admin wrote:
> On Sat, Dec 26, 2020 at 10:18:08AM +0800, Leizhen (ThunderTown) wrote:
>> On 2020/12/25 19:44, Zhen Lei wrote:
>>> The outercache of some Hisilicon SOCs support physical addresses wider
>>> than 32-bits. The unsigned long datatype is not sufficient for mapping
>>> physical addresses >= 4GB. The commit ad6b9c9d78b9 ("ARM: 6671/1: LPAE:
>>> use phys_addr_t instead of unsigned long in outercache functions") has
>>> already modified the outercache functions. But the parameters of the
>>> outercache hooks are not changed. This patch use phys_addr_t instead of
>>> unsigned long in outercache hooks: inv_range, clean_range, flush_range.
>>> To ensure the outercache that does not support LPAE works properly, do
>>> cast phys_addr_t to unsigned long by adding a middle-tier function.
>> This patch will impact the outercache drivers that have not been merged into
>> the kernel. They should also update the datatype of the outercache hooks.
> This isn't much of a concern to mainline. If it's that big a problem
> for you, then please consider merging your code into mainline so that
> everyone can benefit from it.

All right, I got it.


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