diff options
Diffstat (limited to 'kernel/power/main.c')
| -rw-r--r-- | kernel/power/main.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index 6254814d4817..0b0e76324c43 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -962,6 +962,34 @@ power_attr(pm_freeze_timeout); #endif /* CONFIG_FREEZER*/ +#if defined(CONFIG_SUSPEND) || defined(CONFIG_HIBERNATION) +bool filesystem_freeze_enabled = false; + +static ssize_t freeze_filesystems_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "%d\n", filesystem_freeze_enabled); +} + +static ssize_t freeze_filesystems_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; + + filesystem_freeze_enabled = !!val; + return n; +} + +power_attr(freeze_filesystems); +#endif /* CONFIG_SUSPEND || CONFIG_HIBERNATION */ + static struct attribute * g[] = { &state_attr.attr, #ifdef CONFIG_PM_TRACE @@ -992,6 +1020,9 @@ static struct attribute * g[] = { #ifdef CONFIG_FREEZER &pm_freeze_timeout_attr.attr, #endif +#if defined(CONFIG_SUSPEND) || defined(CONFIG_HIBERNATION) + &freeze_filesystems_attr.attr, +#endif NULL, }; |