linux-kernel - Re: linux-next: build failure after merge of the kvm-arm tree

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Message-ID: <d36c9908-f314-414f-99d8-31440696c06b@arm.com>
Date: Wed, 24 Sep 2025 08:07:16 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: Will Deacon <will@...nel.org>, Mark Brown <broonie@...nel.org>
Cc: Christoffer Dall <cdall@...columbia.edu>, Marc Zyngier <maz@...nel.org>,
 Catalin Marinas <catalin.marinas@....com>,
 Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
 Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the kvm-arm tree



On 23/09/25 10:14 PM, Will Deacon wrote:
> On Tue, Sep 23, 2025 at 05:02:02PM +0100, Will Deacon wrote:
>> On Tue, Sep 23, 2025 at 05:28:05PM +0200, Mark Brown wrote:
>>> After merging the kvm-arm tree, today's linux-next build (arm64
>>> defconfig) failed like this:
>>>
>>> In file included from <command-line>:
>>> /tmp/next/build/arch/arm64/kvm/at.c: In function 'setup_s1_walk':
>>> /tmp/next/build/arch/arm64/kvm/at.c:229:30: error: 'TCR_SH1_MASK' undeclared (first use in this function); did you mean 'TCR_SH0_MASK'?
>>>   229 |                    FIELD_GET(TCR_SH1_MASK, tcr) :
>>>       |                              ^~~~~~~~~~~~
>>
>> [...]
>>
>>> Caused by commit
>>>
>>>    4f91624778b27 ("arm64/sysreg: Replace TCR_EL1 field macros")
>>>
>>> from the arm64 tree.  I have reverted that commit.
>>
>> Thanks, I'll drop it from arm64 as well.
> 
> (now dropped)

Hello Will/Mark,

The conflict happened as the commit c0cc438046ee (“KVM: arm64: Compute shareability for LPA2”)
which came in via the KVM tree, added a new TCR_SH1_MASK instance. Shall I respin the patches
accommodating the new changes from KVM or just wait for the next merge window ?

- Anshuman