[PATCH] devreq: move governor.h to a public header location

[PATCH] devreq: move governor.h to a public header location

[Dmitry Baryshkov]

Some device drivers (and out-of-tree modules) might want to define
device-specific device governors. Rather than restricting all of them to
be a part of drivers/devfreq/ (which is not possible for out-of-tree
drivers anyway) move governor.h to include/linux/devfreq-governor.h and
update all drivers to use it.

The devfreq_cpu_data is only used internally, by the passive governor,
so it is moved to the driver source rather than being a part of the
public interface.

Reported-by: Robie Basak <robibasa@qti.qualcomm.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
 drivers/devfreq/devfreq.c                          |  2 +-
 drivers/devfreq/governor_passive.c                 | 27 +++++++++++++++++-
 drivers/devfreq/governor_performance.c             |  2 +-
 drivers/devfreq/governor_powersave.c               |  2 +-
 drivers/devfreq/governor_simpleondemand.c          |  2 +-
 drivers/devfreq/governor_userspace.c               |  2 +-
 drivers/devfreq/hisi_uncore_freq.c                 |  3 +-
 drivers/devfreq/tegra30-devfreq.c                  |  3 +-
 .../governor.h => include/linux/devfreq-governor.h | 33 +++-------------------
 9 files changed, 37 insertions(+), 39 deletions(-)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 2e8d01d47f6996a634a8ad5ddf20c5a68d1a299d..00979f2e0e276a05ee073dcf5cd8e930bdd539fb 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -20,6 +20,7 @@
 #include <linux/stat.h>
 #include <linux/pm_opp.h>
 #include <linux/devfreq.h>
+#include <linux/devfreq-governor.h>
 #include <linux/workqueue.h>
 #include <linux/platform_device.h>
 #include <linux/list.h>
@@ -28,7 +29,6 @@
 #include <linux/of.h>
 #include <linux/pm_qos.h>
 #include <linux/units.h>
-#include "governor.h"
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/devfreq.h>
diff --git a/drivers/devfreq/governor_passive.c b/drivers/devfreq/governor_passive.c
index 953cf9a1e9f7f93804cc889db38883bf97ae005d..8cd6f9a59f6422ccd138ff4b264dc8a547ad574f 100644
--- a/drivers/devfreq/governor_passive.c
+++ b/drivers/devfreq/governor_passive.c
@@ -14,8 +14,33 @@
 #include <linux/slab.h>
 #include <linux/device.h>
 #include <linux/devfreq.h>
+#include <linux/devfreq-governor.h>
 #include <linux/units.h>
-#include "governor.h"
+
+/**
+ * struct devfreq_cpu_data - Hold the per-cpu data
+ * @node:	list node
+ * @dev:	reference to cpu device.
+ * @first_cpu:	the cpumask of the first cpu of a policy.
+ * @opp_table:	reference to cpu opp table.
+ * @cur_freq:	the current frequency of the cpu.
+ * @min_freq:	the min frequency of the cpu.
+ * @max_freq:	the max frequency of the cpu.
+ *
+ * This structure stores the required cpu_data of a cpu.
+ * This is auto-populated by the governor.
+ */
+struct devfreq_cpu_data {
+	struct list_head node;
+
+	struct device *dev;
+	unsigned int first_cpu;
+
+	struct opp_table *opp_table;
+	unsigned int cur_freq;
+	unsigned int min_freq;
+	unsigned int max_freq;
+};
 
 static struct devfreq_cpu_data *
 get_parent_cpu_data(struct devfreq_passive_data *p_data,
diff --git a/drivers/devfreq/governor_performance.c b/drivers/devfreq/governor_performance.c
index 2e4e981446fa8ea39f65b09dddff198c0b8e3338..fdb22bf512cf134d75f1eaf3edb80e562dd28bec 100644
--- a/drivers/devfreq/governor_performance.c
+++ b/drivers/devfreq/governor_performance.c
@@ -7,8 +7,8 @@
  */
 
 #include <linux/devfreq.h>
+#include <linux/devfreq-governor.h>
 #include <linux/module.h>
-#include "governor.h"
 
 static int devfreq_performance_func(struct devfreq *df,
 				    unsigned long *freq)
diff --git a/drivers/devfreq/governor_powersave.c b/drivers/devfreq/governor_powersave.c
index f059e881480465b051f27d740348adaf779aebf0..ee2d6ec8a512248f070b2c5bee8146320b7be312 100644
--- a/drivers/devfreq/governor_powersave.c
+++ b/drivers/devfreq/governor_powersave.c
@@ -7,8 +7,8 @@
  */
 
 #include <linux/devfreq.h>
+#include <linux/devfreq-governor.h>
 #include <linux/module.h>
-#include "governor.h"
 
 static int devfreq_powersave_func(struct devfreq *df,
 				  unsigned long *freq)
diff --git a/drivers/devfreq/governor_simpleondemand.c b/drivers/devfreq/governor_simpleondemand.c
index c234357363675508c12732a08c1cd26c349039d1..9c69b96df5f97306e9be46aa6bb1d9d2f8e58490 100644
--- a/drivers/devfreq/governor_simpleondemand.c
+++ b/drivers/devfreq/governor_simpleondemand.c
@@ -9,8 +9,8 @@
 #include <linux/errno.h>
 #include <linux/module.h>
 #include <linux/devfreq.h>
+#include <linux/devfreq-governor.h>
 #include <linux/math64.h>
-#include "governor.h"
 
 /* Default constants for DevFreq-Simple-Ondemand (DFSO) */
 #define DFSO_UPTHRESHOLD	(90)
diff --git a/drivers/devfreq/governor_userspace.c b/drivers/devfreq/governor_userspace.c
index 175de0c0b50e087861313060eab70a35b757fd20..395174f93960d0762456238654f4d356e21cf57c 100644
--- a/drivers/devfreq/governor_userspace.c
+++ b/drivers/devfreq/governor_userspace.c
@@ -9,11 +9,11 @@
 #include <linux/slab.h>
 #include <linux/device.h>
 #include <linux/devfreq.h>
+#include <linux/devfreq-governor.h>
 #include <linux/kstrtox.h>
 #include <linux/pm.h>
 #include <linux/mutex.h>
 #include <linux/module.h>
-#include "governor.h"
 
 struct userspace_data {
 	unsigned long user_frequency;
diff --git a/drivers/devfreq/hisi_uncore_freq.c b/drivers/devfreq/hisi_uncore_freq.c
index 96d1815059e32c4e70a1d3c257655cc6b162f745..b8e4621c57ebc76513e4eba978aa54f2b884e210 100644
--- a/drivers/devfreq/hisi_uncore_freq.c
+++ b/drivers/devfreq/hisi_uncore_freq.c
@@ -9,6 +9,7 @@
 #include <linux/bits.h>
 #include <linux/cleanup.h>
 #include <linux/devfreq.h>
+#include <linux/devfreq-governor.h>
 #include <linux/device.h>
 #include <linux/dev_printk.h>
 #include <linux/errno.h>
@@ -26,8 +27,6 @@
 #include <linux/units.h>
 #include <acpi/pcc.h>
 
-#include "governor.h"
-
 struct hisi_uncore_pcc_data {
 	u16 status;
 	u16 resv;
diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
index 4a4f0106ab9ddcfb106a1860370cbf8a3579322a..77cbb204087c970c1fec0c1597b1e76c1a11b390 100644
--- a/drivers/devfreq/tegra30-devfreq.c
+++ b/drivers/devfreq/tegra30-devfreq.c
@@ -9,6 +9,7 @@
 #include <linux/clk.h>
 #include <linux/cpufreq.h>
 #include <linux/devfreq.h>
+#include <linux/devfreq-governor.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/irq.h>
@@ -21,8 +22,6 @@
 
 #include <soc/tegra/fuse.h>
 
-#include "governor.h"
-
 #define ACTMON_GLB_STATUS					0x0
 #define ACTMON_GLB_PERIOD_CTRL					0x4
 
diff --git a/drivers/devfreq/governor.h b/include/linux/devfreq-governor.h
similarity index 80%
rename from drivers/devfreq/governor.h
rename to include/linux/devfreq-governor.h
index 0adfebc0467a3db39278814fa66d2b1f25d61f7a..dfdd0160a29f35f5608575b07b450cf5157420ff 100644
--- a/drivers/devfreq/governor.h
+++ b/include/linux/devfreq-governor.h
@@ -5,11 +5,11 @@
  * Copyright (C) 2011 Samsung Electronics
  *	MyungJoo Ham <myungjoo.ham@samsung.com>
  *
- * This header is for devfreq governors in drivers/devfreq/
+ * This header is for devfreq governors
  */
 
-#ifndef _GOVERNOR_H
-#define _GOVERNOR_H
+#ifndef __LINUX_DEVFREQ_DEVFREQ_H__
+#define __LINUX_DEVFREQ_DEVFREQ_H__
 
 #include <linux/devfreq.h>
 
@@ -47,31 +47,6 @@
 #define DEVFREQ_GOV_ATTR_POLLING_INTERVAL		BIT(0)
 #define DEVFREQ_GOV_ATTR_TIMER				BIT(1)
 
-/**
- * struct devfreq_cpu_data - Hold the per-cpu data
- * @node:	list node
- * @dev:	reference to cpu device.
- * @first_cpu:	the cpumask of the first cpu of a policy.
- * @opp_table:	reference to cpu opp table.
- * @cur_freq:	the current frequency of the cpu.
- * @min_freq:	the min frequency of the cpu.
- * @max_freq:	the max frequency of the cpu.
- *
- * This structure stores the required cpu_data of a cpu.
- * This is auto-populated by the governor.
- */
-struct devfreq_cpu_data {
-	struct list_head node;
-
-	struct device *dev;
-	unsigned int first_cpu;
-
-	struct opp_table *opp_table;
-	unsigned int cur_freq;
-	unsigned int min_freq;
-	unsigned int max_freq;
-};
-
 /**
  * struct devfreq_governor - Devfreq policy governor
  * @node:		list node - contains registered devfreq governors
@@ -124,4 +99,4 @@ static inline int devfreq_update_stats(struct devfreq *df)
 
 	return df->profile->get_dev_status(df->dev.parent, &df->last_status);
 }
-#endif /* _GOVERNOR_H */
+#endif /* __LINUX_DEVFREQ_DEVFREQ_H__ */

---
base-commit: 8cd53fb40a304576fa86ba985f3045d5c55b0ae3
change-id: 20250903-governor-public-d9cd4198f858

Best regards,
-- 
With best wishes
Dmitry

Re: [PATCH] devreq: move governor.h to a public header location

[Dmitry Baryshkov]

On Wed, Sep 03, 2025 at 04:43:04PM +0300, Dmitry Baryshkov wrote:
> Some device drivers (and out-of-tree modules) might want to define
> device-specific device governors. Rather than restricting all of them to
> be a part of drivers/devfreq/ (which is not possible for out-of-tree
> drivers anyway) move governor.h to include/linux/devfreq-governor.h and
> update all drivers to use it.
> 
> The devfreq_cpu_data is only used internally, by the passive governor,
> so it is moved to the driver source rather than being a part of the
> public interface.
> 
> Reported-by: Robie Basak <robibasa@qti.qualcomm.com>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---
>  drivers/devfreq/devfreq.c                          |  2 +-
>  drivers/devfreq/governor_passive.c                 | 27 +++++++++++++++++-
>  drivers/devfreq/governor_performance.c             |  2 +-
>  drivers/devfreq/governor_powersave.c               |  2 +-
>  drivers/devfreq/governor_simpleondemand.c          |  2 +-
>  drivers/devfreq/governor_userspace.c               |  2 +-
>  drivers/devfreq/hisi_uncore_freq.c                 |  3 +-
>  drivers/devfreq/tegra30-devfreq.c                  |  3 +-
>  .../governor.h => include/linux/devfreq-governor.h | 33 +++-------------------
>  9 files changed, 37 insertions(+), 39 deletions(-)
> 

Gracious ping, I haven't heard anything back.

-- 
With best wishes
Dmitry

Re: [PATCH] devreq: move governor.h to a public header location

[Jon Hunter]

On 03/09/2025 14:43, Dmitry Baryshkov wrote:
> Some device drivers (and out-of-tree modules) might want to define
> device-specific device governors. Rather than restricting all of them to
> be a part of drivers/devfreq/ (which is not possible for out-of-tree
> drivers anyway) move governor.h to include/linux/devfreq-governor.h and
> update all drivers to use it.
> 
> The devfreq_cpu_data is only used internally, by the passive governor,
> so it is moved to the driver source rather than being a part of the
> public interface.
> 
> Reported-by: Robie Basak <robibasa@qti.qualcomm.com>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---
>   drivers/devfreq/devfreq.c                          |  2 +-
>   drivers/devfreq/governor_passive.c                 | 27 +++++++++++++++++-
>   drivers/devfreq/governor_performance.c             |  2 +-
>   drivers/devfreq/governor_powersave.c               |  2 +-
>   drivers/devfreq/governor_simpleondemand.c          |  2 +-
>   drivers/devfreq/governor_userspace.c               |  2 +-
>   drivers/devfreq/hisi_uncore_freq.c                 |  3 +-
>   drivers/devfreq/tegra30-devfreq.c                  |  3 +-
>   .../governor.h => include/linux/devfreq-governor.h | 33 +++-------------------
>   9 files changed, 37 insertions(+), 39 deletions(-)

For the Tegra part ...

Acked-by: Jon Hunter <jonathanh@nvidia.com>

Jon

-- 
nvpublic

Re: [PATCH] devreq: move governor.h to a public header location

[Mikko Perttunen]

On Wednesday, September 3, 2025 10:43 PM Dmitry Baryshkov wrote:
> Some device drivers (and out-of-tree modules) might want to define
> device-specific device governors. Rather than restricting all of them to
> be a part of drivers/devfreq/ (which is not possible for out-of-tree
> drivers anyway) move governor.h to include/linux/devfreq-governor.h and
> update all drivers to use it.
> 
> The devfreq_cpu_data is only used internally, by the passive governor,
> so it is moved to the driver source rather than being a part of the
> public interface.
> 
> Reported-by: Robie Basak <robibasa@qti.qualcomm.com>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---
> ...

FWIW, the commit subject is missing the 'f' in 'devfreq'.

Thanks,
Mikko

Re: [PATCH] devreq: move governor.h to a public header location

[Jie Zhan]

Hi Dmitry,

On 9/3/2025 9:43 PM, Dmitry Baryshkov wrote:
> Some device drivers (and out-of-tree modules) might want to define
> device-specific device governors. Rather than restricting all of them to
> be a part of drivers/devfreq/ (which is not possible for out-of-tree
> drivers anyway) move governor.h to include/linux/devfreq-governor.h and
> update all drivers to use it.

For out-of-tree module compilation, can it add drivers/devfreq/ to the
include path?
I suppose this is unnecessary.

Minor comments inline.

Thanks,
Jie

> 
> The devfreq_cpu_data is only used internally, by the passive governor,
> so it is moved to the driver source rather than being a part of the
> public interface.
> 
> Reported-by: Robie Basak <robibasa@qti.qualcomm.com>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---
>  drivers/devfreq/devfreq.c                          |  2 +-
>  drivers/devfreq/governor_passive.c                 | 27 +++++++++++++++++-
>  drivers/devfreq/governor_performance.c             |  2 +-
>  drivers/devfreq/governor_powersave.c               |  2 +-
>  drivers/devfreq/governor_simpleondemand.c          |  2 +-
>  drivers/devfreq/governor_userspace.c               |  2 +-
>  drivers/devfreq/hisi_uncore_freq.c                 |  3 +-
>  drivers/devfreq/tegra30-devfreq.c                  |  3 +-
>  .../governor.h => include/linux/devfreq-governor.h | 33 +++-------------------
>  9 files changed, 37 insertions(+), 39 deletions(-)
> 
> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> index 2e8d01d47f6996a634a8ad5ddf20c5a68d1a299d..00979f2e0e276a05ee073dcf5cd8e930bdd539fb 100644
> --- a/drivers/devfreq/devfreq.c
> +++ b/drivers/devfreq/devfreq.c
> @@ -20,6 +20,7 @@
>  #include <linux/stat.h>
>  #include <linux/pm_opp.h>
>  #include <linux/devfreq.h>
> +#include <linux/devfreq-governor.h>
>  #include <linux/workqueue.h>
>  #include <linux/platform_device.h>
>  #include <linux/list.h>
> @@ -28,7 +29,6 @@
>  #include <linux/of.h>
>  #include <linux/pm_qos.h>
>  #include <linux/units.h>
> -#include "governor.h"
>  
>  #define CREATE_TRACE_POINTS
>  #include <trace/events/devfreq.h>
> diff --git a/drivers/devfreq/governor_passive.c b/drivers/devfreq/governor_passive.c
> index 953cf9a1e9f7f93804cc889db38883bf97ae005d..8cd6f9a59f6422ccd138ff4b264dc8a547ad574f 100644
> --- a/drivers/devfreq/governor_passive.c
> +++ b/drivers/devfreq/governor_passive.c
> @@ -14,8 +14,33 @@
>  #include <linux/slab.h>
>  #include <linux/device.h>
>  #include <linux/devfreq.h>
> +#include <linux/devfreq-governor.h>
>  #include <linux/units.h>
> -#include "governor.h"
> +
> +/**
> + * struct devfreq_cpu_data - Hold the per-cpu data
> + * @node:	list node
> + * @dev:	reference to cpu device.
> + * @first_cpu:	the cpumask of the first cpu of a policy.
> + * @opp_table:	reference to cpu opp table.
> + * @cur_freq:	the current frequency of the cpu.
> + * @min_freq:	the min frequency of the cpu.
> + * @max_freq:	the max frequency of the cpu.
> + *
> + * This structure stores the required cpu_data of a cpu.
> + * This is auto-populated by the governor.
> + */
> +struct devfreq_cpu_data {
> +	struct list_head node;
> +
> +	struct device *dev;
> +	unsigned int first_cpu;
> +
> +	struct opp_table *opp_table;
> +	unsigned int cur_freq;
> +	unsigned int min_freq;
> +	unsigned int max_freq;
> +};
>  
>  static struct devfreq_cpu_data *
>  get_parent_cpu_data(struct devfreq_passive_data *p_data,
> diff --git a/drivers/devfreq/governor_performance.c b/drivers/devfreq/governor_performance.c
> index 2e4e981446fa8ea39f65b09dddff198c0b8e3338..fdb22bf512cf134d75f1eaf3edb80e562dd28bec 100644
> --- a/drivers/devfreq/governor_performance.c
> +++ b/drivers/devfreq/governor_performance.c
> @@ -7,8 +7,8 @@
>   */
>  
>  #include <linux/devfreq.h>
> +#include <linux/devfreq-governor.h>
>  #include <linux/module.h>
> -#include "governor.h"
>  
>  static int devfreq_performance_func(struct devfreq *df,
>  				    unsigned long *freq)
> diff --git a/drivers/devfreq/governor_powersave.c b/drivers/devfreq/governor_powersave.c
> index f059e881480465b051f27d740348adaf779aebf0..ee2d6ec8a512248f070b2c5bee8146320b7be312 100644
> --- a/drivers/devfreq/governor_powersave.c
> +++ b/drivers/devfreq/governor_powersave.c
> @@ -7,8 +7,8 @@
>   */
>  
>  #include <linux/devfreq.h>
> +#include <linux/devfreq-governor.h>
>  #include <linux/module.h>
> -#include "governor.h"
>  
>  static int devfreq_powersave_func(struct devfreq *df,
>  				  unsigned long *freq)
> diff --git a/drivers/devfreq/governor_simpleondemand.c b/drivers/devfreq/governor_simpleondemand.c
> index c234357363675508c12732a08c1cd26c349039d1..9c69b96df5f97306e9be46aa6bb1d9d2f8e58490 100644
> --- a/drivers/devfreq/governor_simpleondemand.c
> +++ b/drivers/devfreq/governor_simpleondemand.c
> @@ -9,8 +9,8 @@
>  #include <linux/errno.h>
>  #include <linux/module.h>
>  #include <linux/devfreq.h>
> +#include <linux/devfreq-governor.h>
>  #include <linux/math64.h>
> -#include "governor.h"
>  
>  /* Default constants for DevFreq-Simple-Ondemand (DFSO) */
>  #define DFSO_UPTHRESHOLD	(90)
> diff --git a/drivers/devfreq/governor_userspace.c b/drivers/devfreq/governor_userspace.c
> index 175de0c0b50e087861313060eab70a35b757fd20..395174f93960d0762456238654f4d356e21cf57c 100644
> --- a/drivers/devfreq/governor_userspace.c
> +++ b/drivers/devfreq/governor_userspace.c
> @@ -9,11 +9,11 @@
>  #include <linux/slab.h>
>  #include <linux/device.h>
>  #include <linux/devfreq.h>
> +#include <linux/devfreq-governor.h>
>  #include <linux/kstrtox.h>
>  #include <linux/pm.h>
>  #include <linux/mutex.h>
>  #include <linux/module.h>
> -#include "governor.h"
>  
>  struct userspace_data {
>  	unsigned long user_frequency;
> diff --git a/drivers/devfreq/hisi_uncore_freq.c b/drivers/devfreq/hisi_uncore_freq.c
> index 96d1815059e32c4e70a1d3c257655cc6b162f745..b8e4621c57ebc76513e4eba978aa54f2b884e210 100644
> --- a/drivers/devfreq/hisi_uncore_freq.c
> +++ b/drivers/devfreq/hisi_uncore_freq.c
> @@ -9,6 +9,7 @@
>  #include <linux/bits.h>
>  #include <linux/cleanup.h>
>  #include <linux/devfreq.h>
> +#include <linux/devfreq-governor.h>
>  #include <linux/device.h>
>  #include <linux/dev_printk.h>
>  #include <linux/errno.h>
> @@ -26,8 +27,6 @@
>  #include <linux/units.h>
>  #include <acpi/pcc.h>
>  
> -#include "governor.h"
> -
>  struct hisi_uncore_pcc_data {
>  	u16 status;
>  	u16 resv;
> diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
> index 4a4f0106ab9ddcfb106a1860370cbf8a3579322a..77cbb204087c970c1fec0c1597b1e76c1a11b390 100644
> --- a/drivers/devfreq/tegra30-devfreq.c
> +++ b/drivers/devfreq/tegra30-devfreq.c
> @@ -9,6 +9,7 @@
>  #include <linux/clk.h>
>  #include <linux/cpufreq.h>
>  #include <linux/devfreq.h>
> +#include <linux/devfreq-governor.h>
>  #include <linux/interrupt.h>
>  #include <linux/io.h>
>  #include <linux/irq.h>
> @@ -21,8 +22,6 @@
>  
>  #include <soc/tegra/fuse.h>
>  
> -#include "governor.h"
> -
>  #define ACTMON_GLB_STATUS					0x0
>  #define ACTMON_GLB_PERIOD_CTRL					0x4
>  
> diff --git a/drivers/devfreq/governor.h b/include/linux/devfreq-governor.h
> similarity index 80%
> rename from drivers/devfreq/governor.h
> rename to include/linux/devfreq-governor.h
> index 0adfebc0467a3db39278814fa66d2b1f25d61f7a..dfdd0160a29f35f5608575b07b450cf5157420ff 100644
> --- a/drivers/devfreq/governor.h
> +++ b/include/linux/devfreq-governor.h
> @@ -5,11 +5,11 @@
>   * Copyright (C) 2011 Samsung Electronics
>   *	MyungJoo Ham <myungjoo.ham@samsung.com>
>   *
> - * This header is for devfreq governors in drivers/devfreq/
> + * This header is for devfreq governors
>   */
There is a line of 'governor.h - internal header for devfreq governors.' up
there before this hunk.  That should be updated as well.
>  
> -#ifndef _GOVERNOR_H
> -#define _GOVERNOR_H
> +#ifndef __LINUX_DEVFREQ_DEVFREQ_H__
> +#define __LINUX_DEVFREQ_DEVFREQ_H__
__LINUX_DEVFREQ_GOVERNOR_H__
>  
>  #include <linux/devfreq.h>
>  
> @@ -47,31 +47,6 @@
>  #define DEVFREQ_GOV_ATTR_POLLING_INTERVAL		BIT(0)
>  #define DEVFREQ_GOV_ATTR_TIMER				BIT(1)
>  
> -/**
> - * struct devfreq_cpu_data - Hold the per-cpu data
> - * @node:	list node
> - * @dev:	reference to cpu device.
> - * @first_cpu:	the cpumask of the first cpu of a policy.
> - * @opp_table:	reference to cpu opp table.
> - * @cur_freq:	the current frequency of the cpu.
> - * @min_freq:	the min frequency of the cpu.
> - * @max_freq:	the max frequency of the cpu.
> - *
> - * This structure stores the required cpu_data of a cpu.
> - * This is auto-populated by the governor.
> - */
> -struct devfreq_cpu_data {
> -	struct list_head node;
> -
> -	struct device *dev;
> -	unsigned int first_cpu;
> -
> -	struct opp_table *opp_table;
> -	unsigned int cur_freq;
> -	unsigned int min_freq;
> -	unsigned int max_freq;
> -};
> -
>  /**
>   * struct devfreq_governor - Devfreq policy governor
>   * @node:		list node - contains registered devfreq governors
> @@ -124,4 +99,4 @@ static inline int devfreq_update_stats(struct devfreq *df)
>  
>  	return df->profile->get_dev_status(df->dev.parent, &df->last_status);
>  }
> -#endif /* _GOVERNOR_H */
> +#endif /* __LINUX_DEVFREQ_DEVFREQ_H__ */
> 
> ---
> base-commit: 8cd53fb40a304576fa86ba985f3045d5c55b0ae3
> change-id: 20250903-governor-public-d9cd4198f858
> 
> Best regards,

Re: [PATCH] devreq: move governor.h to a public header location

[Jon Hunter]

On 26/09/2025 04:16, Jie Zhan wrote:
> 
> Hi Dmitry,
> 
> On 9/3/2025 9:43 PM, Dmitry Baryshkov wrote:
>> Some device drivers (and out-of-tree modules) might want to define
>> device-specific device governors. Rather than restricting all of them to
>> be a part of drivers/devfreq/ (which is not possible for out-of-tree
>> drivers anyway) move governor.h to include/linux/devfreq-governor.h and
>> update all drivers to use it.
> 
> For out-of-tree module compilation, can it add drivers/devfreq/ to the
> include path?
> I suppose this is unnecessary.

The kernel header/source package created for most linux distros will not 
included this header because it is internal and so in that case it is 
necessary.

Jon

-- 
nvpublic

Re: [PATCH] devreq: move governor.h to a public header location

[Jie Zhan]

On 9/26/2025 6:33 PM, Jon Hunter wrote:
> 
> On 26/09/2025 04:16, Jie Zhan wrote:
>>
>> Hi Dmitry,
>>
>> On 9/3/2025 9:43 PM, Dmitry Baryshkov wrote:
>>> Some device drivers (and out-of-tree modules) might want to define
>>> device-specific device governors. Rather than restricting all of them to
>>> be a part of drivers/devfreq/ (which is not possible for out-of-tree
>>> drivers anyway) move governor.h to include/linux/devfreq-governor.h and
>>> update all drivers to use it.
>>
>> For out-of-tree module compilation, can it add drivers/devfreq/ to the
>> include path?
>> I suppose this is unnecessary.
> 
> The kernel header/source package created for most linux distros will not included this header because it is internal and so in that case it is necessary.
> 
> Jon
> 
Got it, thanks.