| Message ID | 20220707170103.216736-1-Perry.Yuan@amd.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [01/12] x86/msr: Add the MSR definition for AMD CPPC hardware control. | expand |
On 7/7/22 12:01, Perry Yuan wrote: > cpufreq_cpu_release" and "cpufreq_cpu_acquire" are only used internally by > drivers/cpufreq/cpufreq.c currently. > Export them so that other drivers such as the AMD P-state driver can use them as well. > Can you provide more information on why this is needed for the amd-pstate driver? This patch exports the acquire/release functions but I don't see that the amd-pstate driver is updated to use them. -Nathan > Signed-off-by: Perry Yuan <Perry.Yuan@amd.com> > --- > drivers/cpufreq/cpufreq.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c > index 73432360e6e9..4d3c83da29b7 100644 > --- a/drivers/cpufreq/cpufreq.c > +++ b/drivers/cpufreq/cpufreq.c > @@ -262,6 +262,7 @@ void cpufreq_cpu_release(struct cpufreq_policy *policy) > > cpufreq_cpu_put(policy); > } > +EXPORT_SYMBOL_GPL(cpufreq_cpu_release); > > /** > * cpufreq_cpu_acquire - Find policy for a CPU, mark it as busy and lock it. > @@ -291,6 +292,7 @@ struct cpufreq_policy *cpufreq_cpu_acquire(unsigned int cpu) > > return policy; > } > +EXPORT_SYMBOL_GPL(cpufreq_cpu_acquire); > > /********************************************************************* > * EXTERNALLY AFFECTING FREQUENCY CHANGES *
[AMD Official Use Only - General] Hi Nathon. > -----Original Message----- > From: Fontenot, Nathan <Nathan.Fontenot@amd.com> > Sent: Friday, July 8, 2022 3:40 AM > To: Yuan, Perry <Perry.Yuan@amd.com>; rafael.j.wysocki@intel.com; > viresh.kumar@linaro.org; Huang, Ray <Ray.Huang@amd.com>; Rafael J. > Wysocki <rafael@kernel.org>; linux-pm@vger.kernel.org; linux- > kernel@vger.kernel.org > Cc: Sharma, Deepak <Deepak.Sharma@amd.com>; Limonciello, Mario > <Mario.Limonciello@amd.com>; Fontenot, Nathan > <Nathan.Fontenot@amd.com>; Deucher, Alexander > <Alexander.Deucher@amd.com>; Su, Jinzhou (Joe) <Jinzhou.Su@amd.com>; > Huang, Shimmer <Shimmer.Huang@amd.com>; Du, Xiaojian > <Xiaojian.Du@amd.com>; Meng, Li (Jassmine) <Li.Meng@amd.com> > Subject: Re: [PATCH 10/12] cpufreq: cpufreq: export cpufreq cpu release and > acquire > > On 7/7/22 12:01, Perry Yuan wrote: > > cpufreq_cpu_release" and "cpufreq_cpu_acquire" are only used > > internally by drivers/cpufreq/cpufreq.c currently. > > Export them so that other drivers such as the AMD P-state driver can use > them as well. > > > > Can you provide more information on why this is needed for the amd- > pstate driver? > > This patch exports the acquire/release functions but I don't see that the > amd-pstate driver is updated to use them. > > -Nathan It is used in the next CPPC EPP patch set which will be sent out soon. As the amd-pstate is built as module driver, this patch exports the symbol to pstate driver. Perry. > > > Signed-off-by: Perry Yuan <Perry.Yuan@amd.com> > > --- > > drivers/cpufreq/cpufreq.c | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c > > index 73432360e6e9..4d3c83da29b7 100644 > > --- a/drivers/cpufreq/cpufreq.c > > +++ b/drivers/cpufreq/cpufreq.c > > @@ -262,6 +262,7 @@ void cpufreq_cpu_release(struct cpufreq_policy > > *policy) > > > > cpufreq_cpu_put(policy); > > } > > +EXPORT_SYMBOL_GPL(cpufreq_cpu_release); > > > > /** > > * cpufreq_cpu_acquire - Find policy for a CPU, mark it as busy and lock it. > > @@ -291,6 +292,7 @@ struct cpufreq_policy > > *cpufreq_cpu_acquire(unsigned int cpu) > > > > return policy; > > } > > +EXPORT_SYMBOL_GPL(cpufreq_cpu_acquire); > > > > > /************************************************************** > ******* > > * EXTERNALLY AFFECTING FREQUENCY CHANGES *
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 73432360e6e9..4d3c83da29b7 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -262,6 +262,7 @@ void cpufreq_cpu_release(struct cpufreq_policy *policy) cpufreq_cpu_put(policy); } +EXPORT_SYMBOL_GPL(cpufreq_cpu_release); /** * cpufreq_cpu_acquire - Find policy for a CPU, mark it as busy and lock it. @@ -291,6 +292,7 @@ struct cpufreq_policy *cpufreq_cpu_acquire(unsigned int cpu) return policy; } +EXPORT_SYMBOL_GPL(cpufreq_cpu_acquire); /********************************************************************* * EXTERNALLY AFFECTING FREQUENCY CHANGES *
cpufreq_cpu_release" and "cpufreq_cpu_acquire" are only used internally by drivers/cpufreq/cpufreq.c currently. Export them so that other drivers such as the AMD P-state driver can use them as well. Signed-off-by: Perry Yuan <Perry.Yuan@amd.com> --- drivers/cpufreq/cpufreq.c | 2 ++ 1 file changed, 2 insertions(+)