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-rw-r--r--drivers/base/core.c43
-rw-r--r--drivers/base/cpu.c2
-rw-r--r--drivers/base/memory.c4
-rw-r--r--drivers/base/power/main.c77
-rw-r--r--drivers/base/power/opp.c1
5 files changed, 77 insertions, 50 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c
index c7b0925f627..c7cfadcf675 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -50,6 +50,28 @@ static struct kobject *dev_kobj;
struct kobject *sysfs_dev_char_kobj;
struct kobject *sysfs_dev_block_kobj;
+static DEFINE_MUTEX(device_hotplug_lock);
+
+void lock_device_hotplug(void)
+{
+ mutex_lock(&device_hotplug_lock);
+}
+
+void unlock_device_hotplug(void)
+{
+ mutex_unlock(&device_hotplug_lock);
+}
+
+int lock_device_hotplug_sysfs(void)
+{
+ if (mutex_trylock(&device_hotplug_lock))
+ return 0;
+
+ /* Avoid busy looping (5 ms of sleep should do). */
+ msleep(5);
+ return restart_syscall();
+}
+
#ifdef CONFIG_BLOCK
static inline int device_is_not_partition(struct device *dev)
{
@@ -407,9 +429,9 @@ static ssize_t online_show(struct device *dev, struct device_attribute *attr,
{
bool val;
- lock_device_hotplug();
+ device_lock(dev);
val = !dev->offline;
- unlock_device_hotplug();
+ device_unlock(dev);
return sprintf(buf, "%u\n", val);
}
@@ -423,7 +445,10 @@ static ssize_t online_store(struct device *dev, struct device_attribute *attr,
if (ret < 0)
return ret;
- lock_device_hotplug();
+ ret = lock_device_hotplug_sysfs();
+ if (ret)
+ return ret;
+
ret = val ? device_online(dev) : device_offline(dev);
unlock_device_hotplug();
return ret < 0 ? ret : count;
@@ -1450,18 +1475,6 @@ int __init devices_init(void)
return -ENOMEM;
}
-static DEFINE_MUTEX(device_hotplug_lock);
-
-void lock_device_hotplug(void)
-{
- mutex_lock(&device_hotplug_lock);
-}
-
-void unlock_device_hotplug(void)
-{
- mutex_unlock(&device_hotplug_lock);
-}
-
static int device_check_offline(struct device *dev, void *not_used)
{
int ret;
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 6bfaaca6955..848ebbd2571 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -14,6 +14,7 @@
#include <linux/slab.h>
#include <linux/percpu.h>
#include <linux/acpi.h>
+#include <linux/of.h>
#include "base.h"
@@ -293,6 +294,7 @@ int register_cpu(struct cpu *cpu, int num)
cpu->dev.release = cpu_device_release;
cpu->dev.offline_disabled = !cpu->hotpluggable;
cpu->dev.offline = !cpu_online(num);
+ cpu->dev.of_node = of_get_cpu_node(num, NULL);
#ifdef CONFIG_ARCH_HAS_CPU_AUTOPROBE
cpu->dev.bus->uevent = arch_cpu_uevent;
#endif
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 1c617623c8a..9e59f6535c4 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -321,7 +321,9 @@ store_mem_state(struct device *dev,
struct memory_block *mem = to_memory_block(dev);
int ret, online_type;
- lock_device_hotplug();
+ ret = lock_device_hotplug_sysfs();
+ if (ret)
+ return ret;
if (!strncmp(buf, "online_kernel", min_t(int, count, 13)))
online_type = ONLINE_KERNEL;
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 5a9b6569dd7..9f098a82cf0 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -28,6 +28,7 @@
#include <linux/sched.h>
#include <linux/async.h>
#include <linux/suspend.h>
+#include <trace/events/power.h>
#include <linux/cpuidle.h>
#include "../base.h"
#include "power.h"
@@ -56,6 +57,30 @@ static pm_message_t pm_transition;
static int async_error;
+static char *pm_verb(int event)
+{
+ switch (event) {
+ case PM_EVENT_SUSPEND:
+ return "suspend";
+ case PM_EVENT_RESUME:
+ return "resume";
+ case PM_EVENT_FREEZE:
+ return "freeze";
+ case PM_EVENT_QUIESCE:
+ return "quiesce";
+ case PM_EVENT_HIBERNATE:
+ return "hibernate";
+ case PM_EVENT_THAW:
+ return "thaw";
+ case PM_EVENT_RESTORE:
+ return "restore";
+ case PM_EVENT_RECOVER:
+ return "recover";
+ default:
+ return "(unknown PM event)";
+ }
+}
+
/**
* device_pm_sleep_init - Initialize system suspend-related device fields.
* @dev: Device object being initialized.
@@ -172,16 +197,21 @@ static ktime_t initcall_debug_start(struct device *dev)
}
static void initcall_debug_report(struct device *dev, ktime_t calltime,
- int error)
+ int error, pm_message_t state, char *info)
{
- ktime_t delta, rettime;
+ ktime_t rettime;
+ s64 nsecs;
+
+ rettime = ktime_get();
+ nsecs = (s64) ktime_to_ns(ktime_sub(rettime, calltime));
if (pm_print_times_enabled) {
- rettime = ktime_get();
- delta = ktime_sub(rettime, calltime);
pr_info("call %s+ returned %d after %Ld usecs\n", dev_name(dev),
- error, (unsigned long long)ktime_to_ns(delta) >> 10);
+ error, (unsigned long long)nsecs >> 10);
}
+
+ trace_device_pm_report_time(dev, info, nsecs, pm_verb(state.event),
+ error);
}
/**
@@ -309,30 +339,6 @@ static pm_callback_t pm_noirq_op(const struct dev_pm_ops *ops, pm_message_t stat
return NULL;
}
-static char *pm_verb(int event)
-{
- switch (event) {
- case PM_EVENT_SUSPEND:
- return "suspend";
- case PM_EVENT_RESUME:
- return "resume";
- case PM_EVENT_FREEZE:
- return "freeze";
- case PM_EVENT_QUIESCE:
- return "quiesce";
- case PM_EVENT_HIBERNATE:
- return "hibernate";
- case PM_EVENT_THAW:
- return "thaw";
- case PM_EVENT_RESTORE:
- return "restore";
- case PM_EVENT_RECOVER:
- return "recover";
- default:
- return "(unknown PM event)";
- }
-}
-
static void pm_dev_dbg(struct device *dev, pm_message_t state, char *info)
{
dev_dbg(dev, "%s%s%s\n", info, pm_verb(state.event),
@@ -379,7 +385,7 @@ static int dpm_run_callback(pm_callback_t cb, struct device *dev,
error = cb(dev);
suspend_report_result(cb, error);
- initcall_debug_report(dev, calltime, error);
+ initcall_debug_report(dev, calltime, error, state, info);
return error;
}
@@ -1027,7 +1033,8 @@ EXPORT_SYMBOL_GPL(dpm_suspend_end);
* @cb: Suspend callback to execute.
*/
static int legacy_suspend(struct device *dev, pm_message_t state,
- int (*cb)(struct device *dev, pm_message_t state))
+ int (*cb)(struct device *dev, pm_message_t state),
+ char *info)
{
int error;
ktime_t calltime;
@@ -1037,7 +1044,7 @@ static int legacy_suspend(struct device *dev, pm_message_t state,
error = cb(dev, state);
suspend_report_result(cb, error);
- initcall_debug_report(dev, calltime, error);
+ initcall_debug_report(dev, calltime, error, state, info);
return error;
}
@@ -1097,7 +1104,8 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
goto Run;
} else if (dev->class->suspend) {
pm_dev_dbg(dev, state, "legacy class ");
- error = legacy_suspend(dev, state, dev->class->suspend);
+ error = legacy_suspend(dev, state, dev->class->suspend,
+ "legacy class ");
goto End;
}
}
@@ -1108,7 +1116,8 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
callback = pm_op(dev->bus->pm, state);
} else if (dev->bus->suspend) {
pm_dev_dbg(dev, state, "legacy bus ");
- error = legacy_suspend(dev, state, dev->bus->suspend);
+ error = legacy_suspend(dev, state, dev->bus->suspend,
+ "legacy bus ");
goto End;
}
}
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
index c8ec186303d..ef89897c604 100644
--- a/drivers/base/power/opp.c
+++ b/drivers/base/power/opp.c
@@ -460,6 +460,7 @@ int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
srcu_notifier_call_chain(&dev_opp->head, OPP_EVENT_ADD, new_opp);
return 0;
}
+EXPORT_SYMBOL_GPL(opp_add);
/**
* opp_set_availability() - helper to set the availability of an opp
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-13 10:16:05 +0000