diff options
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/wakelock.c | 51 |
1 files changed, 23 insertions, 28 deletions
diff --git a/kernel/power/wakelock.c b/kernel/power/wakelock.c index 263de24f801..4b0e26065be 100644 --- a/kernel/power/wakelock.c +++ b/kernel/power/wakelock.c @@ -40,8 +40,6 @@ module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP); #define WAKE_LOCK_AUTO_EXPIRE (1U << 10) #define WAKE_LOCK_PREVENTING_SUSPEND (1U << 11) -#define TOO_MAY_LOCKS_WARNING "\n\ntoo many wakelocks!!!\n" - static DEFINE_SPINLOCK(list_lock); static LIST_HEAD(inactive_locks); static struct list_head active_wake_locks[WAKE_LOCK_TYPE_COUNT]; @@ -83,14 +81,13 @@ int get_expired_time(struct wake_lock *lock, ktime_t *expire_time) } -static int print_lock_stat(char *buf, int len, struct wake_lock *lock) +static int print_lock_stat(struct seq_file *m, struct wake_lock *lock) { int lock_count = lock->stat.count; int expire_count = lock->stat.expire_count; ktime_t active_time = ktime_set(0, 0); ktime_t total_time = lock->stat.total_time; ktime_t max_time = lock->stat.max_time; - int n; ktime_t prevent_suspend_time = lock->stat.prevent_suspend_time; if (lock->flags & WAKE_LOCK_ACTIVE) { @@ -112,48 +109,34 @@ static int print_lock_stat(char *buf, int len, struct wake_lock *lock) max_time = add_time; } - n = snprintf(buf, len, + return seq_printf(m, "\"%s\"\t%d\t%d\t%d\t%lld\t%lld\t%lld\t%lld\t%lld\n", lock->name, lock_count, expire_count, lock->stat.wakeup_count, ktime_to_ns(active_time), ktime_to_ns(total_time), ktime_to_ns(prevent_suspend_time), ktime_to_ns(max_time), ktime_to_ns(lock->stat.last_time)); - - return n > len ? len : n; } - -static int wakelocks_read_proc(char *page, char **start, off_t off, - int count, int *eof, void *data) +static int wakelock_stats_show(struct seq_file *m, void *unused) { unsigned long irqflags; struct wake_lock *lock; - int len = 0; + int ret; int type; spin_lock_irqsave(&list_lock, irqflags); - len += snprintf(page + len, count - len, - "name\tcount\texpire_count\twake_count\tactive_since" + ret = seq_puts(m, "name\tcount\texpire_count\twake_count\tactive_since" "\ttotal_time\tsleep_time\tmax_time\tlast_change\n"); - list_for_each_entry(lock, &inactive_locks, link) { - len += print_lock_stat(page + len, count - len, lock); - } + list_for_each_entry(lock, &inactive_locks, link) + ret = print_lock_stat(m, lock); for (type = 0; type < WAKE_LOCK_TYPE_COUNT; type++) { list_for_each_entry(lock, &active_wake_locks[type], link) - len += print_lock_stat(page + len, count - len, lock); + ret = print_lock_stat(m, lock); } spin_unlock_irqrestore(&list_lock, irqflags); - - if (len == count) - memcpy(page + len - strlen(TOO_MAY_LOCKS_WARNING), - TOO_MAY_LOCKS_WARNING, - strlen(TOO_MAY_LOCKS_WARNING)); - - *eof = 1; - - return len; + return 0; } static void wake_unlock_stat_locked(struct wake_lock *lock, int expired) @@ -535,6 +518,19 @@ int wake_lock_active(struct wake_lock *lock) } EXPORT_SYMBOL(wake_lock_active); +static int wakelock_stats_open(struct inode *inode, struct file *file) +{ + return single_open(file, wakelock_stats_show, NULL); +} + +static const struct file_operations wakelock_stats_fops = { + .owner = THIS_MODULE, + .open = wakelock_stats_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static int __init wakelocks_init(void) { int ret; @@ -569,8 +565,7 @@ static int __init wakelocks_init(void) } #ifdef CONFIG_WAKELOCK_STAT - create_proc_read_entry("wakelocks", S_IRUGO, NULL, - wakelocks_read_proc, NULL); + proc_create("wakelocks", S_IRUGO, NULL, &wakelock_stats_fops); #endif return 0; |