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Subject: Re: linux-next: build failure after merge of the arm64 tree
To:     Besar Wicaksono <bwicaksono@nvidia.com>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>
References: <20221116090401.0cd5ccc7@canb.auug.org.au>
 <SJ0PR12MB56762CFC0B8D680B05828EF8A0049@SJ0PR12MB5676.namprd12.prod.outlook.com>
From:   Suzuki K Poulose <suzuki.poulose@arm.com>
In-Reply-To: <SJ0PR12MB56762CFC0B8D680B05828EF8A0049@SJ0PR12MB5676.namprd12.prod.outlook.com>
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On 15/11/2022 23:52, Besar Wicaksono wrote:
> 
> 
>> -----Original Message-----
>> From: Stephen Rothwell <sfr@canb.auug.org.au>
>> Sent: Tuesday, November 15, 2022 4:04 PM
>> To: Catalin Marinas <catalin.marinas@arm.com>; Will Deacon
>> <will@kernel.org>
>> Cc: Besar Wicaksono <bwicaksono@nvidia.com>; Linux Kernel Mailing List
>> <linux-kernel@vger.kernel.org>; Linux Next Mailing List <linux-
>> next@vger.kernel.org>
>> Subject: linux-next: build failure after merge of the arm64 tree
>>
>> Hi all,
>>
>> After merging the arm64 tree, today's linux-next build (x86_64
>> allmodconfig) failed like this:
>>
>> drivers/perf/arm_cspmu/arm_cspmu.c: In function 'arm_cspmu_get_cpus':
>> drivers/perf/arm_cspmu/arm_cspmu.c:1114:29: error: implicit declaration of
>> function 'get_acpi_id_for_cpu' [-Werror=implicit-function-declaration]
>>   1114 |                             get_acpi_id_for_cpu(cpu)) {
>>        |                             ^~~~~~~~~~~~~~~~~~~
>>
> 
> +CC Suzuki for awareness.
> 
> This function is used for searching CPU with matching ACPI Processor ID in PPTT.
> I will check if adding PPTT dependency to arm_cspmu would resolve this issue.

Please make this dependent on ARM64. That should resolve the failure.
As such the helper is available with ARM64 && ACPI.

Suzuki

> 
> Regards,
> Besar
> 
>> Caused by commit
>>
>>    e37dfd65731d ("perf: arm_cspmu: Add support for ARM CoreSight PMU
>> driver")
>>
>> I have used the arm64 tree from next-20221115 for today.
>>
>> --
>> Cheers,
>> Stephen Rothwell