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Wysocki" , Amit Kucheria , Ben Segall , Dietmar Eggemann , Ingo Molnar , Juri Lelli , Mel Gorman , Peter Zijlstra , Steven Rostedt , Vincent Guittot , Zhang Rui Cc: linux-doc@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH v5 1/6] thermal: Remove netlink support Date: Mon, 21 Oct 2019 17:45:10 +0530 Message-Id: <8ff02cf62186c7a54fff325fad40a2e9ca3affa6.1571656014.git.amit.kucheria@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org There are no users of netlink messages for thermal inside the kernel. Remove the code and adjust the documentation. Signed-off-by: Amit Kucheria Acked-by: Viresh Kumar --- .../driver-api/thermal/sysfs-api.rst | 26 ++--- drivers/thermal/thermal_core.c | 101 +----------------- include/linux/thermal.h | 11 -- 3 files changed, 7 insertions(+), 131 deletions(-) -- 2.17.1 diff --git a/Documentation/driver-api/thermal/sysfs-api.rst b/Documentation/driver-api/thermal/sysfs-api.rst index fab2c9b36d084..b40b1f8391481 100644 --- a/Documentation/driver-api/thermal/sysfs-api.rst +++ b/Documentation/driver-api/thermal/sysfs-api.rst @@ -725,24 +725,10 @@ method, the sys I/F structure will be built like this:: |---temp1_input: 37000 |---temp1_crit: 100000 -4. Event Notification +4. Export Symbol APIs ===================== -The framework includes a simple notification mechanism, in the form of a -netlink event. Netlink socket initialization is done during the _init_ -of the framework. Drivers which intend to use the notification mechanism -just need to call thermal_generate_netlink_event() with two arguments viz -(originator, event). The originator is a pointer to struct thermal_zone_device -from where the event has been originated. An integer which represents the -thermal zone device will be used in the message to identify the zone. The -event will be one of:{THERMAL_AUX0, THERMAL_AUX1, THERMAL_CRITICAL, -THERMAL_DEV_FAULT}. Notification can be sent when the current temperature -crosses any of the configured thresholds. - -5. Export Symbol APIs -===================== - -5.1. get_tz_trend +4.1. get_tz_trend ----------------- This function returns the trend of a thermal zone, i.e the rate of change @@ -751,14 +737,14 @@ are supposed to implement the callback. If they don't, the thermal framework calculated the trend by comparing the previous and the current temperature values. -5.2. get_thermal_instance +4.2. get_thermal_instance ------------------------- This function returns the thermal_instance corresponding to a given {thermal_zone, cooling_device, trip_point} combination. Returns NULL if such an instance does not exist. -5.3. thermal_notify_framework +4.3. thermal_notify_framework ----------------------------- This function handles the trip events from sensor drivers. It starts @@ -768,14 +754,14 @@ and does actual throttling for other trip points i.e ACTIVE and PASSIVE. The throttling policy is based on the configured platform data; if no platform data is provided, this uses the step_wise throttling policy. -5.4. thermal_cdev_update +4.4. thermal_cdev_update ------------------------ This function serves as an arbitrator to set the state of a cooling device. It sets the cooling device to the deepest cooling state if possible. -6. thermal_emergency_poweroff +5. thermal_emergency_poweroff ============================= On an event of critical trip temperature crossing. Thermal framework diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index d4481cc8958fe..cced0638b686f 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -19,8 +19,6 @@ #include #include #include -#include -#include #include #define CREATE_TRACE_POINTS @@ -1464,97 +1462,6 @@ struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) } EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); -#ifdef CONFIG_NET -static const struct genl_multicast_group thermal_event_mcgrps[] = { - { .name = THERMAL_GENL_MCAST_GROUP_NAME, }, -}; - -static struct genl_family thermal_event_genl_family __ro_after_init = { - .module = THIS_MODULE, - .name = THERMAL_GENL_FAMILY_NAME, - .version = THERMAL_GENL_VERSION, - .maxattr = THERMAL_GENL_ATTR_MAX, - .mcgrps = thermal_event_mcgrps, - .n_mcgrps = ARRAY_SIZE(thermal_event_mcgrps), -}; - -int thermal_generate_netlink_event(struct thermal_zone_device *tz, - enum events event) -{ - struct sk_buff *skb; - struct nlattr *attr; - struct thermal_genl_event *thermal_event; - void *msg_header; - int size; - int result; - static unsigned int thermal_event_seqnum; - - if (!tz) - return -EINVAL; - - /* allocate memory */ - size = nla_total_size(sizeof(struct thermal_genl_event)) + - nla_total_size(0); - - skb = genlmsg_new(size, GFP_ATOMIC); - if (!skb) - return -ENOMEM; - - /* add the genetlink message header */ - msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, - &thermal_event_genl_family, 0, - THERMAL_GENL_CMD_EVENT); - if (!msg_header) { - nlmsg_free(skb); - return -ENOMEM; - } - - /* fill the data */ - attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, - sizeof(struct thermal_genl_event)); - - if (!attr) { - nlmsg_free(skb); - return -EINVAL; - } - - thermal_event = nla_data(attr); - if (!thermal_event) { - nlmsg_free(skb); - return -EINVAL; - } - - memset(thermal_event, 0, sizeof(struct thermal_genl_event)); - - thermal_event->orig = tz->id; - thermal_event->event = event; - - /* send multicast genetlink message */ - genlmsg_end(skb, msg_header); - - result = genlmsg_multicast(&thermal_event_genl_family, skb, 0, - 0, GFP_ATOMIC); - if (result) - dev_err(&tz->device, "Failed to send netlink event:%d", result); - - return result; -} -EXPORT_SYMBOL_GPL(thermal_generate_netlink_event); - -static int __init genetlink_init(void) -{ - return genl_register_family(&thermal_event_genl_family); -} - -static void genetlink_exit(void) -{ - genl_unregister_family(&thermal_event_genl_family); -} -#else /* !CONFIG_NET */ -static inline int genetlink_init(void) { return 0; } -static inline void genetlink_exit(void) {} -#endif /* !CONFIG_NET */ - static int thermal_pm_notify(struct notifier_block *nb, unsigned long mode, void *_unused) { @@ -1607,13 +1514,9 @@ static int __init thermal_init(void) if (result) goto unregister_governors; - result = genetlink_init(); - if (result) - goto unregister_class; - result = of_parse_thermal_zones(); if (result) - goto exit_netlink; + goto unregister_class; result = register_pm_notifier(&thermal_pm_nb); if (result) @@ -1622,8 +1525,6 @@ static int __init thermal_init(void) return 0; -exit_netlink: - genetlink_exit(); unregister_class: class_unregister(&thermal_class); unregister_governors: diff --git a/include/linux/thermal.h b/include/linux/thermal.h index e45659c759209..d9111aebb97d6 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -544,15 +544,4 @@ static inline void thermal_notify_framework(struct thermal_zone_device *tz, { } #endif /* CONFIG_THERMAL */ -#if defined(CONFIG_NET) && IS_ENABLED(CONFIG_THERMAL) -extern int thermal_generate_netlink_event(struct thermal_zone_device *tz, - enum events event); -#else -static inline int thermal_generate_netlink_event(struct thermal_zone_device *tz, - enum events event) -{ - return 0; -} -#endif - #endif /* __THERMAL_H__ */ From patchwork Mon Oct 21 12:15:11 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amit Kucheria X-Patchwork-Id: 177070 Delivered-To: patch@linaro.org Received: by 2002:a92:409a:0:0:0:0:0 with SMTP id d26csp3336377ill; 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Wysocki" , Amit Kucheria , Ben Segall , Dietmar Eggemann , Ingo Molnar , Juri Lelli , Mel Gorman , Peter Zijlstra , Steven Rostedt , Vincent Guittot , Zhang Rui Cc: linux-pm@vger.kernel.org Subject: [PATCH v5 2/6] thermal: Initialize thermal subsystem earlier Date: Mon, 21 Oct 2019 17:45:11 +0530 Message-Id: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Now that the thermal framework is built-in, in order to facilitate thermal mitigation as early as possible in the boot cycle, move the thermal framework initialization to core_initcall. Signed-off-by: Amit Kucheria Acked-by: Viresh Kumar --- drivers/thermal/thermal_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.17.1 diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index cced0638b686f..69fcd54f8a83e 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1537,4 +1537,4 @@ static int __init thermal_init(void) mutex_destroy(&poweroff_lock); return result; } -fs_initcall(thermal_init); +core_initcall(thermal_init);