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authorRafael J. Wysocki2012-06-21 00:19:33 +0200
committerRafael J. Wysocki2012-07-01 13:31:23 +0200
commitb2df1d4f8b95d9d1e3f064cef02fc5c5116b05cf (patch)
tree6e891ad6ad748ea737ab5774983f90d9be720446 /kernel/power
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>
Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/Kconfig4
-rw-r--r--kernel/power/main.c76
2 files changed, 46 insertions, 34 deletions
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();
}