From: Dominik Brodowski <linux@dominikbrodowski.net>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linux-omap@vger.kernel.org,
Vincent Guittot <vincent.guittot@linaro.org>,
Kevin Hilman <khilman@kernel.org>,
linux-tegra@vger.kernel.org, linux-mips@vger.kernel.org,
linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org,
Rafael Wysocki <rjw@rjwysocki.net>,
linux-kernel@vger.kernel.org,
Krzysztof Kozlowski <krzk@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
linux-samsung-soc@vger.kernel.org, Andy Gross <agross@kernel.org>,
Thierry Reding <thierry.reding@gmail.com>,
Sudeep Holla <sudeep.holla@arm.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
linux-mediatek@lists.infradead.org,
Jonathan Hunter <jonathanh@nvidia.com>,
Keguang Zhang <keguang.zhang@gmail.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] cpufreq: Remove CPUFREQ_STICKY flag
Date: Mon, 1 Feb 2021 10:44:15 +0100 [thread overview]
Message-ID: <YBfNb91psVcf3TAS@light.dominikbrodowski.net> (raw)
In-Reply-To: <377d2e2d328276070ae2f26c65daa1497bb3c3cf.1612166647.git.viresh.kumar@linaro.org>
Viresh,
Am Mon, Feb 01, 2021 at 01:35:51PM +0530 schrieb Viresh Kumar:
> The removal of such a driver is avoided if the driver carries the
> CPUFREQ_STICKY flag. This was added way back [1] in 2004 and perhaps no
> one should ever need it now. A lot of driver do set this flag, probably
> because they just copied it from another driver.
IIRC, it was required on various ARM systems,[*] as CPUs were registered as
subsys_initcall(), while cpufreq used to be initialized only later, as an
arch_initcall(). If the ordering is opposite now on all architectures (it
wasn't on ARM back then), we should be fine.
[*] https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git/commit/arch/arm/mach-sa1100/cpu-sa1100.c?id=f59d3bbe35f6268d729f51be82af8325d62f20f5
Thanks,
Dominik
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next prev parent reply other threads:[~2021-02-01 9:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-01 8:05 [PATCH] cpufreq: Remove CPUFREQ_STICKY flag Viresh Kumar
2021-02-01 9:44 ` Dominik Brodowski [this message]
2021-02-01 10:05 ` Viresh Kumar
2021-02-01 14:02 ` Rafael J. Wysocki
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