summaryrefslogtreecommitdiffstats
path: root/drivers/base
diff options
context:
space:
mode:
authorSameer Nanda <snanda@chromium.org>2012-06-19 22:23:33 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2012-07-01 13:31:22 +0200
commit4b7760ba0dd3319f66886ab2335a0fbecdbc808a (patch)
treef619ead7186c286a5f8c786091af8c46de0decf3 /drivers/base
parentftrace: Disable function tracing during suspend/resume and hibernation, again (diff)
downloadlinux-4b7760ba0dd3319f66886ab2335a0fbecdbc808a.tar.xz
linux-4b7760ba0dd3319f66886ab2335a0fbecdbc808a.zip
PM / Sleep: add knob for printing device resume times
Added a new knob called /sys/power/pm_print_times. Setting it to 1 enables printing of time taken by devices to suspend and resume. Setting it to 0 disables this printing (unless overridden by initcall_debug kernel command line option). Signed-off-by: Sameer Nanda <snanda@chromium.org> Acked-by: Greg KH <gregkh@linuxfoundation.org> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/power/main.c4
-rw-r--r--drivers/base/power/power.h11
2 files changed, 13 insertions, 2 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 9cb845e49334..6e4db96958d1 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 (initcall_debug) {
+ if (pm_print_times) {
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 (initcall_debug) {
+ if (pm_print_times) {
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 eeb4bff9505c..12c77b7ff8e8 100644
--- a/drivers/base/power/power.h
+++ b/drivers/base/power/power.h
@@ -85,3 +85,14 @@ 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 */