51 static int thread_should_wake(struct jffs2_sb_info *c);
53 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c)  in jffs2_garbage_collect_trigger()  argument
55 	spin_lock_bh(&c->erase_completion_lock);  in jffs2_garbage_collect_trigger()
56         if (c->gc_task && thread_should_wake(c))  in jffs2_garbage_collect_trigger()
57                 send_sig(SIGHUP, c->gc_task, 1);  in jffs2_garbage_collect_trigger()
58 	spin_unlock_bh(&c->erase_completion_lock);  in jffs2_garbage_collect_trigger()
62 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c)  in jffs2_start_garbage_collect_thread()  argument
67 	if (c->gc_task)  in jffs2_start_garbage_collect_thread()
70 	init_MUTEX_LOCKED(&c->gc_thread_start);  in jffs2_start_garbage_collect_thread()
71 	init_completion(&c->gc_thread_exit);  in jffs2_start_garbage_collect_thread()
73 	pid = kernel_thread(jffs2_garbage_collect_thread, c, CLONE_FS|CLONE_FILES);  in jffs2_start_garbage_collect_thread()
76 		complete(&c->gc_thread_exit);  in jffs2_start_garbage_collect_thread()
81 		down(&c->gc_thread_start);  in jffs2_start_garbage_collect_thread()
87 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c)  in jffs2_stop_garbage_collect_thread()  argument
89 	spin_lock_bh(&c->erase_completion_lock);  in jffs2_stop_garbage_collect_thread()
90 	if (c->gc_task) {  in jffs2_stop_garbage_collect_thread()
91 		D1(printk(KERN_DEBUG "jffs2: Killing GC task %d\n", c->gc_task->pid));  in jffs2_stop_garbage_collect_thread()
92 		send_sig(SIGKILL, c->gc_task, 1);  in jffs2_stop_garbage_collect_thread()
94 	spin_unlock_bh(&c->erase_completion_lock);  in jffs2_stop_garbage_collect_thread()
95 	wait_for_completion(&c->gc_thread_exit);  in jffs2_stop_garbage_collect_thread()
100 	struct jffs2_sb_info *c = _c;  in jffs2_garbage_collect_thread()  local
104 	c->gc_task = current;  in jffs2_garbage_collect_thread()
105 	up(&c->gc_thread_start);  in jffs2_garbage_collect_thread()
107         sprintf(current->comm, "jffs2_gcd_mtd%d", c->mtd->index);  in jffs2_garbage_collect_thread()
118 		if (!thread_should_wake(c)) {  in jffs2_garbage_collect_thread()
150 				spin_lock_bh(&c->erase_completion_lock);  in jffs2_garbage_collect_thread()
151                                 c->gc_task = NULL;  in jffs2_garbage_collect_thread()
152 				spin_unlock_bh(&c->erase_completion_lock);  in jffs2_garbage_collect_thread()
153 				complete_and_exit(&c->gc_thread_exit, 0);  in jffs2_garbage_collect_thread()
170 		jffs2_garbage_collect_pass(c);  in jffs2_garbage_collect_thread()
174 static int thread_should_wake(struct jffs2_sb_info *c)  in thread_should_wake()  argument
177 		  c->nr_free_blocks, c->nr_erasing_blocks, c->dirty_size));  in thread_should_wake()
178 	if (c->nr_free_blocks + c->nr_erasing_blocks < JFFS2_RESERVED_BLOCKS_GCTRIGGER &&  in thread_should_wake()
179 	    c->dirty_size > c->sector_size)  in thread_should_wake()