From: Kefeng Wang <wangkefeng.wang@huawei.com>
To: Sudeep Holla <sudeep.holla@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mikko Perttunen <mperttunen@nvidia.com>,
Sumit Gupta <sumitg@nvidia.com>,
Viresh Kumar <viresh.kumar@linaro.org>,
Hulk Robot <hulkci@huawei.com>,
"linux-kernel@vger.kernel.org List"
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>, <hch@infradead.org>,
"Anshuman Khandual" <anshuman.khandual@arm.com>
Subject: Re: [PATCH -next] arm64: Export __cpu_logical_map
Date: Sat, 25 Jul 2020 10:00:35 +0800 [thread overview]
Message-ID: <c24b88be-e711-66d8-796a-8964af1762de@huawei.com> (raw)
In-Reply-To: <20200724131059.GB6521@bogus>
On 2020/7/24 21:10, Sudeep Holla wrote:
> On Fri, Jul 24, 2020 at 11:08:03AM +0800, Kefeng Wang wrote:
>> +maillist
>>
>> On 2020/7/24 11:04, Kefeng Wang wrote:
>>> ERROR: modpost: "__cpu_logical_map" [drivers/cpufreq/tegra194-cpufreq.ko] undefined!
>>>
>>> ARM64 tegra194-cpufreq driver use cpu_logical_map, export
>>> __cpu_logical_map to fix build issue.
>>>
> I wonder why like other instances in the drivers, the mpidr is not get
> directly from the cpu. The cpufreq_driver->init call happens when the cpu
> is being brought online and is executed on the required cpu IIUC.
>
> read_cpuid_mpidr() is inline and avoids having to export the logical_cpu_map.
> Though we may not add physical hotplug anytime soon, less dependency
> on this cpu_logical_map is better given that we can resolve this without
> the need to access the map.
Hi all, thanks for all comments.
As Sudeep said, I will using read_cpuid_mpidr() directly in
tegra194-cpufreq to
fix the build issue, and later we also would turn cpu_logical_map()
into a C wrapper.
If that's ok, I will send a new build-fix patch firstly, thanks.
>
WARNING: multiple messages have this Message-ID (diff)
From: Kefeng Wang <wangkefeng.wang@huawei.com>
To: Sudeep Holla <sudeep.holla@arm.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
"linux-kernel@vger.kernel.org List"
<linux-kernel@vger.kernel.org>,
Mikko Perttunen <mperttunen@nvidia.com>,
hch@infradead.org, Hulk Robot <hulkci@huawei.com>,
Viresh Kumar <viresh.kumar@linaro.org>,
Sumit Gupta <sumitg@nvidia.com>, Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH -next] arm64: Export __cpu_logical_map
Date: Sat, 25 Jul 2020 10:00:35 +0800 [thread overview]
Message-ID: <c24b88be-e711-66d8-796a-8964af1762de@huawei.com> (raw)
In-Reply-To: <20200724131059.GB6521@bogus>
On 2020/7/24 21:10, Sudeep Holla wrote:
> On Fri, Jul 24, 2020 at 11:08:03AM +0800, Kefeng Wang wrote:
>> +maillist
>>
>> On 2020/7/24 11:04, Kefeng Wang wrote:
>>> ERROR: modpost: "__cpu_logical_map" [drivers/cpufreq/tegra194-cpufreq.ko] undefined!
>>>
>>> ARM64 tegra194-cpufreq driver use cpu_logical_map, export
>>> __cpu_logical_map to fix build issue.
>>>
> I wonder why like other instances in the drivers, the mpidr is not get
> directly from the cpu. The cpufreq_driver->init call happens when the cpu
> is being brought online and is executed on the required cpu IIUC.
>
> read_cpuid_mpidr() is inline and avoids having to export the logical_cpu_map.
> Though we may not add physical hotplug anytime soon, less dependency
> on this cpu_logical_map is better given that we can resolve this without
> the need to access the map.
Hi all, thanks for all comments.
As Sudeep said, I will using read_cpuid_mpidr() directly in
tegra194-cpufreq to
fix the build issue, and later we also would turn cpu_logical_map()
into a C wrapper.
If that's ok, I will send a new build-fix patch firstly, thanks.
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-07-25 2:01 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200724030433.22287-1-wangkefeng.wang@huawei.com>
2020-07-24 3:08 ` [PATCH -next] arm64: Export __cpu_logical_map Kefeng Wang
2020-07-24 3:08 ` Kefeng Wang
2020-07-24 8:16 ` Anshuman Khandual
2020-07-24 8:16 ` Anshuman Khandual
2020-07-24 9:13 ` Mark Rutland
2020-07-24 9:13 ` Mark Rutland
2020-07-24 9:35 ` Catalin Marinas
2020-07-24 9:35 ` Catalin Marinas
2020-07-24 10:33 ` Anshuman Khandual
2020-07-24 10:33 ` Anshuman Khandual
2020-07-24 9:16 ` Kefeng Wang
2020-07-24 9:16 ` Kefeng Wang
2020-07-24 9:30 ` Catalin Marinas
2020-07-24 9:30 ` Catalin Marinas
2020-07-24 10:36 ` Anshuman Khandual
2020-07-24 10:36 ` Anshuman Khandual
2020-07-24 9:43 ` Christoph Hellwig
2020-07-24 9:43 ` Christoph Hellwig
2020-07-24 13:10 ` Sudeep Holla
2020-07-24 13:10 ` Sudeep Holla
2020-07-25 2:00 ` Kefeng Wang [this message]
2020-07-25 2:00 ` Kefeng Wang
2020-07-26 11:46 ` Sumit Gupta
2020-07-26 11:46 ` Sumit Gupta
2020-07-27 16:05 ` Sudeep Holla
2020-07-27 16:05 ` Sudeep Holla
2020-08-01 12:16 ` Sumit Gupta
2020-08-01 12:16 ` Sumit Gupta
2020-08-10 7:49 ` Sudeep Holla
2020-08-10 7:49 ` Sudeep Holla
2020-08-10 10:19 ` Catalin Marinas
2020-08-10 10:19 ` Catalin Marinas
2020-08-10 12:11 ` Sudeep Holla
2020-08-10 12:11 ` Sudeep Holla
2020-08-11 19:44 ` Sumit Gupta
2020-08-11 19:44 ` Sumit Gupta
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=c24b88be-e711-66d8-796a-8964af1762de@huawei.com \
--to=wangkefeng.wang@huawei.com \
--cc=anshuman.khandual@arm.com \
--cc=catalin.marinas@arm.com \
--cc=hch@infradead.org \
--cc=hulkci@huawei.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mperttunen@nvidia.com \
--cc=sudeep.holla@arm.com \
--cc=sumitg@nvidia.com \
--cc=viresh.kumar@linaro.org \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.