PM / autosleep: Use workqueue for user space wakeup sources garbage collector (6ce12a97) · Commits · 戴 / test

kernel/power/wakelock.c

+15 −3

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		#include <linux/list.h>
		#include <linux/rbtree.h>
		#include <linux/slab.h>
		#include <linux/workqueue.h>

		#include "power.h"

		@@ -83,7 +84,9 @@ static inline void decrement_wakelocks_number(void) {}
		#define WL_GC_COUNT_MAX 100
		#define WL_GC_TIME_SEC 300

		static void __wakelocks_gc(struct work_struct *work);
		static LIST_HEAD(wakelocks_lru_list);
		static DECLARE_WORK(wakelock_work, __wakelocks_gc);
		static unsigned int wakelocks_gc_count;

		static inline void wakelocks_lru_add(struct wakelock *wl)
		@@ -96,13 +99,12 @@ static inline void wakelocks_lru_most_recent(struct wakelock *wl)
		list_move(&wl->lru, &wakelocks_lru_list);
		}

		static void wakelocks_gc(void)
		static void __wakelocks_gc(struct work_struct *work)
		{
		struct wakelock wl, aux;
		ktime_t now;

		if (++wakelocks_gc_count <= WL_GC_COUNT_MAX)
		return;
		mutex_lock(&wakelocks_lock);

		now = ktime_get();
		list_for_each_entry_safe_reverse(wl, aux, &wakelocks_lru_list, lru) {
		@@ -127,6 +129,16 @@ static void wakelocks_gc(void)
		}
		}
		wakelocks_gc_count = 0;

		mutex_unlock(&wakelocks_lock);
		}

		static void wakelocks_gc(void)
		{
		if (++wakelocks_gc_count <= WL_GC_COUNT_MAX)
		return;

		schedule_work(&wakelock_work);
		}
		#else /* !CONFIG_PM_WAKELOCKS_GC */
		static inline void wakelocks_lru_add(struct wakelock *wl) {}