Cleanup the headers declaration which are not used
actually and some duplicated declaration which is declarated in some
other headers already, it will help to simplify the header part.

Reviewed-by: Huang Rui <ray.huang@amd.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
---
 drivers/cpufreq/amd-pstate.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 9ac75c1cde9c..19a078e232dd 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -31,19 +31,14 @@
 #include <linux/compiler.h>
 #include <linux/dmi.h>
 #include <linux/slab.h>
-#include <linux/acpi.h>
 #include <linux/io.h>
 #include <linux/delay.h>
 #include <linux/uaccess.h>
 #include <linux/static_call.h>
 
-#include <acpi/processor.h>
 #include <acpi/cppc_acpi.h>
 
 #include <asm/msr.h>
-#include <asm/processor.h>
-#include <asm/cpufeature.h>
-#include <asm/cpu_device_id.h>
 #include "amd-pstate-trace.h"
 
 #define AMD_PSTATE_TRANSITION_LATENCY	0x20000
-- 
2.34.1

Hi Perry,

Perry Yuan <Perry.Yuan@amd.com> writes:

> Cleanup the headers declaration which are not used
> actually and some duplicated declaration which is declarated in some
> other headers already, it will help to simplify the header part.

We usually don't get rid of indirectly included headers as long as
definitions from header are used in the code. This avoids problems if
for some reason the included header gets dropped - it'll leave the code
in an uncompilable state.

More below.

>
> Reviewed-by: Huang Rui <ray.huang@amd.com>
> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
> Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
> ---
>  drivers/cpufreq/amd-pstate.c | 5 -----
>  1 file changed, 5 deletions(-)
>
> diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
> index 9ac75c1cde9c..19a078e232dd 100644
> --- a/drivers/cpufreq/amd-pstate.c
> +++ b/drivers/cpufreq/amd-pstate.c
> @@ -31,19 +31,14 @@
>  #include <linux/compiler.h>
>  #include <linux/dmi.h>
>  #include <linux/slab.h>
> -#include <linux/acpi.h>
>  #include <linux/io.h>
>  #include <linux/delay.h>
>  #include <linux/uaccess.h>
>  #include <linux/static_call.h>
>  
> -#include <acpi/processor.h>
>  #include <acpi/cppc_acpi.h>
>  
>  #include <asm/msr.h>
> -#include <asm/processor.h>

On a quick scan, I noticed that "boot_cpu_data" and "boot_cpu_has()" in
the module init function are defined in "asm/processor.h" that is being
removed here. It may compile for now but makes the code more fragile as
explained above.

Please ensure that only the header files that have no definitions used
in this file (amd-pstate.c) are dropped.

> -#include <asm/cpufeature.h>
> -#include <asm/cpu_device_id.h>
>  #include "amd-pstate-trace.h"
>  
>  #define AMD_PSTATE_TRANSITION_LATENCY	0x20000

[AMD Official Use Only - General]

Hi Punit, 

> -----Original Message-----
> From: Punit Agrawal <punit.agrawal@bytedance.com>
> Sent: Monday, August 15, 2022 11:05 PM
> To: Yuan, Perry <Perry.Yuan@amd.com>
> Cc: rafael.j.wysocki@intel.com; Huang, Ray <Ray.Huang@amd.com>;
> viresh.kumar@linaro.org; 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>; linux-
> pm@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH v5 1/7] cpufreq: amd-pstate: cleanup the unused and
> duplicated headers declaration
> 
> [CAUTION: External Email]
> 
> Hi Perry,
> 
> Perry Yuan <Perry.Yuan@amd.com> writes:
> 
> > Cleanup the headers declaration which are not used actually and some
> > duplicated declaration which is declarated in some other headers
> > already, it will help to simplify the header part.
> 
> We usually don't get rid of indirectly included headers as long as definitions from
> header are used in the code. This avoids problems if for some reason the
> included header gets dropped - it'll leave the code in an uncompilable state.
> 
> More below.
> 
> >
> > Reviewed-by: Huang Rui <ray.huang@amd.com>
> > Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
> > Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
> > ---
> >  drivers/cpufreq/amd-pstate.c | 5 -----
> >  1 file changed, 5 deletions(-)
> >
> > diff --git a/drivers/cpufreq/amd-pstate.c
> > b/drivers/cpufreq/amd-pstate.c index 9ac75c1cde9c..19a078e232dd 100644
> > --- a/drivers/cpufreq/amd-pstate.c
> > +++ b/drivers/cpufreq/amd-pstate.c
> > @@ -31,19 +31,14 @@
> >  #include <linux/compiler.h>
> >  #include <linux/dmi.h>
> >  #include <linux/slab.h>
> > -#include <linux/acpi.h>
> >  #include <linux/io.h>
> >  #include <linux/delay.h>
> >  #include <linux/uaccess.h>
> >  #include <linux/static_call.h>
> >
> > -#include <acpi/processor.h>
> >  #include <acpi/cppc_acpi.h>
> >
> >  #include <asm/msr.h>
> > -#include <asm/processor.h>
> 
> On a quick scan, I noticed that "boot_cpu_data" and "boot_cpu_has()" in the
> module init function are defined in "asm/processor.h" that is being removed
> here. It may compile for now but makes the code more fragile as explained
> above.
> 
> Please ensure that only the header files that have no definitions used in this file
> (amd-pstate.c) are dropped.

Here is the part of the headers we are working on.

==============================================
#include <linux/static_call.h>

#include <acpi/cppc_acpi.h>

#include <asm/msr.h>
#include "amd-pstate-trace.h"

============================================

I have tested the latest Linux-pm/bleeding-edge branch to verify the changes working.
As I know  the "asm/processor.h" is included  by the  "acpi/cppc_acpi.h" subpath

#include <acpi/cppc_acpi.h> 
   #include <linux/acpi.h>
         #include <acpi/acpi.h> 
              #include <asm/acpi.h>  
                       #include <asm/processor.h>
 
To make it comfortable for us, I will send V6 for this patch (1/7)

Perry.

> 
> > -#include <asm/cpufeature.h>
> > -#include <asm/cpu_device_id.h>
> >  #include "amd-pstate-trace.h"
> >
> >  #define AMD_PSTATE_TRANSITION_LATENCY        0x20000