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| author | James Morris <james.l.morris@oracle.com> | 2017-11-29 12:47:41 +1100 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2017-11-29 12:47:41 +1100 |
| commit | cf40a76e7d5874bb25f4404eecc58a2e033af885 (patch) | |
| tree | 8fd81cbea03c87b3d41d7ae5b1d11eadd35d6ef5 /kernel/power/main.c | |
| parent | ab5348c9c23cd253f5902980d2d8fe067dc24c82 (diff) | |
| parent | 4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323 (diff) | |
Merge tag 'v4.15-rc1' into next-seccomp
Linux 4.15-rc1
Diffstat (limited to 'kernel/power/main.c')
| -rw-r--r-- | kernel/power/main.c | 64 |
1 files changed, 59 insertions, 5 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index 42bd800a6755..3a2ca9066583 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -150,7 +150,7 @@ static ssize_t mem_sleep_store(struct kobject *kobj, struct kobj_attribute *attr power_attr(mem_sleep); #endif /* CONFIG_SUSPEND */ -#ifdef CONFIG_PM_DEBUG +#ifdef CONFIG_PM_SLEEP_DEBUG int pm_test_level = TEST_NONE; static const char * const pm_tests[__TEST_AFTER_LAST] = { @@ -211,7 +211,7 @@ static ssize_t pm_test_store(struct kobject *kobj, struct kobj_attribute *attr, } power_attr(pm_test); -#endif /* CONFIG_PM_DEBUG */ +#endif /* CONFIG_PM_SLEEP_DEBUG */ #ifdef CONFIG_DEBUG_FS static char *suspend_step_name(enum suspend_stat_step step) @@ -361,6 +361,61 @@ static ssize_t pm_wakeup_irq_show(struct kobject *kobj, power_attr_ro(pm_wakeup_irq); +bool pm_debug_messages_on __read_mostly; + +static ssize_t pm_debug_messages_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", pm_debug_messages_on); +} + +static ssize_t pm_debug_messages_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_debug_messages_on = !!val; + return n; +} + +power_attr(pm_debug_messages); + +/** + * __pm_pr_dbg - Print a suspend debug message to the kernel log. + * @defer: Whether or not to use printk_deferred() to print the message. + * @fmt: Message format. + * + * The message will be emitted if enabled through the pm_debug_messages + * sysfs attribute. + */ +void __pm_pr_dbg(bool defer, const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + + if (!pm_debug_messages_on) + return; + + va_start(args, fmt); + + vaf.fmt = fmt; + vaf.va = &args; + + if (defer) + printk_deferred(KERN_DEBUG "PM: %pV", &vaf); + else + printk(KERN_DEBUG "PM: %pV", &vaf); + + va_end(args); +} + #else /* !CONFIG_PM_SLEEP_DEBUG */ static inline void pm_print_times_init(void) {} #endif /* CONFIG_PM_SLEEP_DEBUG */ @@ -691,12 +746,11 @@ static struct attribute * g[] = { &wake_lock_attr.attr, &wake_unlock_attr.attr, #endif -#ifdef CONFIG_PM_DEBUG - &pm_test_attr.attr, -#endif #ifdef CONFIG_PM_SLEEP_DEBUG + &pm_test_attr.attr, &pm_print_times_attr.attr, &pm_wakeup_irq_attr.attr, + &pm_debug_messages_attr.attr, #endif #endif #ifdef CONFIG_FREEZER |