summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorRafael J. Wysocki <rjw@sisk.pl>2012-06-21 00:19:33 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2012-07-01 13:31:23 +0200
commitb2df1d4f8b95d9d1e3f064cef02fc5c5116b05cf (patch)
tree6e891ad6ad748ea737ab5774983f90d9be720446
parent4b7760ba0dd3319f66886ab2335a0fbecdbc808a (diff)
PM / Sleep: Separate printing suspend times from initcall_debug
Change the behavior of the newly introduced /sys/power/pm_print_times attribute so that its initial value depends on initcall_debug, but setting it to 0 will cause device suspend/resume times not to be printed, even if initcall_debug has been set. This way, the people who use initcall_debug for reasons other than PM debugging will be able to switch the suspend/resume times printing off, if need be. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/base/power/main.c4
-rw-r--r--drivers/base/power/power.h11
-rw-r--r--include/linux/suspend.h6
-rw-r--r--kernel/power/Kconfig4
-rw-r--r--kernel/power/main.c76
5 files changed, 54 insertions, 47 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 6e4db96958d1..df5f41d2ec95 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -166,7 +166,7 @@ static ktime_t initcall_debug_start(struct device *dev)
{
ktime_t calltime = ktime_set(0, 0);
- if (pm_print_times) {
+ if (pm_print_times_enabled) {
pr_info("calling %s+ @ %i, parent: %s\n",
dev_name(dev), task_pid_nr(current),
dev->parent ? dev_name(dev->parent) : "none");
@@ -181,7 +181,7 @@ static void initcall_debug_report(struct device *dev, ktime_t calltime,
{
ktime_t delta, rettime;
- if (pm_print_times) {
+ 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),
diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
index 12c77b7ff8e8..eeb4bff9505c 100644
--- a/drivers/base/power/power.h
+++ b/drivers/base/power/power.h
@@ -85,14 +85,3 @@ static inline int pm_qos_sysfs_add(struct device *dev) { return 0; }
static inline void pm_qos_sysfs_remove(struct device *dev) {}
#endif
-
-#ifdef CONFIG_PM_DEBUG
-
-extern int pm_print_times_enabled;
-#define pm_print_times (initcall_debug || pm_print_times_enabled)
-
-#else /* CONFIG_PM_DEBUG */
-
-#define pm_print_times initcall_debug
-
-#endif /* CONFIG_PM_DEBUG */
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index cd83059fb592..0c808d7fa579 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -408,6 +408,12 @@ static inline void unlock_system_sleep(void) {}
#endif /* !CONFIG_PM_SLEEP */
+#ifdef CONFIG_PM_SLEEP_DEBUG
+extern bool pm_print_times_enabled;
+#else
+#define pm_print_times_enabled (false)
+#endif
+
#ifdef CONFIG_PM_AUTOSLEEP
/* kernel/power/autosleep.c */
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 8f9b4eb974e0..a70518c9d82f 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -175,7 +175,7 @@ config PM_TEST_SUSPEND
You probably want to have your system's RTC driver statically
linked, ensuring that it's available when this test runs.
-config CAN_PM_TRACE
+config PM_SLEEP_DEBUG
def_bool y
depends on PM_DEBUG && PM_SLEEP
@@ -196,7 +196,7 @@ config PM_TRACE
config PM_TRACE_RTC
bool "Suspend/resume event tracing"
- depends on CAN_PM_TRACE
+ depends on PM_SLEEP_DEBUG
depends on X86
select PM_TRACE
---help---
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 7beb3fb3670b..f458238109cc 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -132,38 +132,6 @@ static ssize_t pm_test_store(struct kobject *kobj, struct kobj_attribute *attr,
}
power_attr(pm_test);
-
-/*
- * pm_print_times: print time taken by devices to suspend and resume.
- *
- * show() returns whether printing of suspend and resume times is enabled.
- * store() accepts 0 or 1. 0 disables printing and 1 enables it.
- */
-int pm_print_times_enabled;
-
-static ssize_t pm_print_times_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
-{
- return sprintf(buf, "%d\n", pm_print_times_enabled);
-}
-
-static ssize_t pm_print_times_store(struct kobject *kobj,
- struct kobj_attribute *attr,
- const char *buf, size_t n)
-{
- unsigned long val;
-
- if (kstrtoul(buf, 10, &val))
- return -EINVAL;
-
- if (val > 1)
- return -EINVAL;
-
- pm_print_times_enabled = val;
- return n;
-}
-
-power_attr(pm_print_times);
#endif /* CONFIG_PM_DEBUG */
#ifdef CONFIG_DEBUG_FS
@@ -267,6 +235,47 @@ late_initcall(pm_debugfs_init);
#endif /* CONFIG_PM_SLEEP */
+#ifdef CONFIG_PM_SLEEP_DEBUG
+/*
+ * pm_print_times: print time taken by devices to suspend and resume.
+ *
+ * show() returns whether printing of suspend and resume times is enabled.
+ * store() accepts 0 or 1. 0 disables printing and 1 enables it.
+ */
+bool pm_print_times_enabled;
+
+static ssize_t pm_print_times_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", pm_print_times_enabled);
+}
+
+static ssize_t pm_print_times_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t n)
+{
+ unsigned long val;
+
+ if (kstrtoul(buf, 10, &val))
+ return -EINVAL;
+
+ if (val > 1)
+ return -EINVAL;
+
+ pm_print_times_enabled = !!val;
+ return n;
+}
+
+power_attr(pm_print_times);
+
+static inline void pm_print_times_init(void)
+{
+ pm_print_times_enabled = !!initcall_debug;
+}
+#else /* !CONFIG_PP_SLEEP_DEBUG */
+static inline void pm_print_times_init(void) {}
+#endif /* CONFIG_PM_SLEEP_DEBUG */
+
struct kobject *power_kobj;
/**
@@ -562,6 +571,8 @@ static struct attribute * g[] = {
#endif
#ifdef CONFIG_PM_DEBUG
&pm_test_attr.attr,
+#endif
+#ifdef CONFIG_PM_SLEEP_DEBUG
&pm_print_times_attr.attr,
#endif
#endif
@@ -599,6 +610,7 @@ static int __init pm_init(void)
error = sysfs_create_group(power_kobj, &attr_group);
if (error)
return error;
+ pm_print_times_init();
return pm_autosleep_init();
}