Re: [RFC,3/5] Thermal: build thermal governors into thermal_sys module
From: Eduardo Valentin
Date: Tue Mar 26 2013 - 18:31:48 EST
Hi Rui,
On 26-03-2013 12:26, Zhang Rui wrote:
Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
---
drivers/thermal/Makefile | 6 +++---
drivers/thermal/fair_share.c | 15 ++-------------
drivers/thermal/step_wise.c | 16 ++--------------
drivers/thermal/thermal_core.c | 36 ++++++++++++++++++++++++++++++++++--
drivers/thermal/thermal_core.h | 25 +++++++++++++++++++++++++
drivers/thermal/user_space.c | 15 ++-------------
include/linux/thermal.h | 1 -
7 files changed, 68 insertions(+), 46 deletions(-)
diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
index b2009bd..b7fffc7 100644
--- a/drivers/thermal/Makefile
+++ b/drivers/thermal/Makefile
@@ -6,9 +6,9 @@ obj-$(CONFIG_THERMAL) += thermal_sys.o
thermal_sys-y += thermal_core.o
# governors
-obj-$(CONFIG_THERMAL_GOV_FAIR_SHARE) += fair_share.o
-obj-$(CONFIG_THERMAL_GOV_STEP_WISE) += step_wise.o
-obj-$(CONFIG_THERMAL_GOV_USER_SPACE) += user_space.o
+thermal_sys-$(CONFIG_THERMAL_GOV_FAIR_SHARE) += fair_share.o
+thermal_sys-$(CONFIG_THERMAL_GOV_STEP_WISE) += step_wise.o
+thermal_sys-$(CONFIG_THERMAL_GOV_USER_SPACE) += user_space.o
# cpufreq cooling
obj-$(CONFIG_CPU_THERMAL) += cpu_cooling.o
diff --git a/drivers/thermal/fair_share.c b/drivers/thermal/fair_share.c
index 792479f..944ba2f 100644
--- a/drivers/thermal/fair_share.c
+++ b/drivers/thermal/fair_share.c
@@ -22,9 +22,6 @@
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
#include <linux/thermal.h>
#include "thermal_core.h"
@@ -111,23 +108,15 @@ static int fair_share_throttle(struct thermal_zone_device *tz, int trip)
static struct thermal_governor thermal_gov_fair_share = {
.name = "fair_share",
.throttle = fair_share_throttle,
- .owner = THIS_MODULE,
};
-static int __init thermal_gov_fair_share_init(void)
+int thermal_gov_fair_share_register(void)
{
return thermal_register_governor(&thermal_gov_fair_share);
}
-static void __exit thermal_gov_fair_share_exit(void)
+void thermal_gov_fair_share_unregister(void)
{
thermal_unregister_governor(&thermal_gov_fair_share);
}
-/* This should load after thermal framework */
-fs_initcall(thermal_gov_fair_share_init);
-module_exit(thermal_gov_fair_share_exit);
-
-MODULE_AUTHOR("Durgadoss R");
-MODULE_DESCRIPTION("A simple weight based thermal throttling governor");
-MODULE_LICENSE("GPL");
diff --git a/drivers/thermal/step_wise.c b/drivers/thermal/step_wise.c
index 407cde3..a6c9666 100644
--- a/drivers/thermal/step_wise.c
+++ b/drivers/thermal/step_wise.c
@@ -22,9 +22,6 @@
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
#include <linux/thermal.h>
#include "thermal_core.h"
@@ -180,23 +177,14 @@ static int step_wise_throttle(struct thermal_zone_device *tz, int trip)
static struct thermal_governor thermal_gov_step_wise = {
.name = "step_wise",
.throttle = step_wise_throttle,
- .owner = THIS_MODULE,
};
-static int __init thermal_gov_step_wise_init(void)
+int thermal_gov_step_wise_register(void)
{
return thermal_register_governor(&thermal_gov_step_wise);
}
-static void __exit thermal_gov_step_wise_exit(void)
+void thermal_gov_step_wise_unregister(void)
{
thermal_unregister_governor(&thermal_gov_step_wise);
}
-
-/* This should load after thermal framework */
-fs_initcall(thermal_gov_step_wise_init);
-module_exit(thermal_gov_step_wise_exit);
-
-MODULE_AUTHOR("Durgadoss R");
-MODULE_DESCRIPTION("A step-by-step thermal throttling governor");
-MODULE_LICENSE("GPL");
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 845ed6e..eac9745 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1858,22 +1858,54 @@ static inline int genetlink_init(void) { return 0; }
static inline void genetlink_exit(void) {}
#endif /* !CONFIG_NET */
+static int __init thermal_register_governors(void)
+{
+ int result;
+
+ result = thermal_gov_step_wise_register();
+ if (result)
+ return result;
+
+ result = thermal_gov_fair_share_register();
+ if (result)
+ return result;
+
+ result = thermal_gov_user_space_register();
+
+ return result;
Just do a
+ return thermal_gov_user_space_register();
Or better, add err messages in the fail path.
+}
+
+static void __exit thermal_unregister_governors(void)
+{
+ thermal_gov_step_wise_unregister();
+ thermal_gov_fair_share_unregister();
+ thermal_gov_user_space_unregister();
+}
+
static int __init thermal_init(void)
{
- int result = 0;
+ int result;
+
+ result = thermal_register_governors();
+ if (result)
+ return result;
result = class_register(&thermal_class);
if (result)
return result;
result = genetlink_init();
+ if (result)
+ class_unregister(&thermal_class);
+
return result;
ditto.
}
static void __exit thermal_exit(void)
{
- class_unregister(&thermal_class);
genetlink_exit();
+ class_unregister(&thermal_class);
+ thermal_unregister_governors();
}
fs_initcall(thermal_init);
diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h
index 0d3205a..f84ea0f 100644
--- a/drivers/thermal/thermal_core.h
+++ b/drivers/thermal/thermal_core.h
@@ -50,4 +50,29 @@ struct thermal_instance {
struct list_head cdev_node; /* node in cdev->thermal_instances */
};
+
+#ifdef CONFIG_THERMAL_GOV_STEP_WISE
+extern int thermal_gov_step_wise_register(void);
+extern void thermal_gov_step_wise_unregister(void);
As you are compiling everything in same binary, I don't think you need
externs there.
+#else
+static inline int thermal_gov_step_wise_register(void) { return 0; }
+static inline void thermal_gov_step_wise_unregister(void) {}
+#endif /* CONFIG_THERMAL_GOV_STEP_WISE */
+
+#ifdef CONFIG_THERMAL_GOV_FAIR_SHARE
+extern int thermal_gov_fair_share_register(void);
+extern void thermal_gov_fair_share_unregister(void);
ditto.
+#else
+static inline int thermal_gov_fair_share_register(void) { return 0; }
+static inline void thermal_gov_fair_share_unregister(void) {}
+#endif /* CONFIG_THERMAL_GOV_FAIR_SHARE */
+
+#ifdef CONFIG_THERMAL_GOV_USER_SPACE
+extern int thermal_gov_user_space_register(void);
+extern void thermal_gov_user_space_unregister(void);
ditto.
+#else
+static inline int thermal_gov_user_space_register(void) { return 0; }
+static inline void thermal_gov_user_space_unregister(void) {}
+#endif /* CONFIG_THERMAL_GOV_USER_SPACE */
+
#endif /* __THERMAL_CORE_H__ */
diff --git a/drivers/thermal/user_space.c b/drivers/thermal/user_space.c
index 6bbb380..10adcdd 100644
--- a/drivers/thermal/user_space.c
+++ b/drivers/thermal/user_space.c
@@ -22,9 +22,6 @@
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
#include <linux/thermal.h>
#include "thermal_core.h"
@@ -46,23 +43,15 @@ static int notify_user_space(struct thermal_zone_device *tz, int trip)
static struct thermal_governor thermal_gov_user_space = {
.name = "user_space",
.throttle = notify_user_space,
- .owner = THIS_MODULE,
};
-static int __init thermal_gov_user_space_init(void)
+int thermal_gov_user_space_register(void)
{
return thermal_register_governor(&thermal_gov_user_space);
}
-static void __exit thermal_gov_user_space_exit(void)
+void thermal_gov_user_space_unregister(void)
{
thermal_unregister_governor(&thermal_gov_user_space);
}
-/* This should load after thermal framework */
-fs_initcall(thermal_gov_user_space_init);
-module_exit(thermal_gov_user_space_exit);
-
-MODULE_AUTHOR("Durgadoss R");
-MODULE_DESCRIPTION("A user space Thermal notifier");
-MODULE_LICENSE("GPL");
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index f0bd7f9..2eeec01 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -184,7 +184,6 @@ struct thermal_governor {
char name[THERMAL_NAME_LENGTH];
int (*throttle)(struct thermal_zone_device *tz, int trip);
struct list_head governor_list;
- struct module *owner;
};
/* Structure that holds binding parameters for a zone */
--
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