45 	wl_tree_add(e, &ubi->free);  in return_unused_peb()
50  * return_unused_pool_pebs - returns unused PEB to the free tree.
79 	if (!ubi->free.rb_node || (ubi->free_count - ubi->beb_rsvd_pebs < 1))  in ubi_wl_get_fm_peb()
83 		e = find_anchor_wl_entry(&ubi->free);  in ubi_wl_get_fm_peb()
85 		e = find_mean_wl_entry(ubi, &ubi->free);  in ubi_wl_get_fm_peb()
90 	self_check_in_wl_tree(ubi, e, &ubi->free);  in ubi_wl_get_fm_peb()
92 	/* remove it from the free list,  in ubi_wl_get_fm_peb()
94 	rb_erase(&e->u.rb, &ubi->free);  in ubi_wl_get_fm_peb()
101  * has_enough_free_count - whether ubi has enough free pebs to fill fm pools
105  * This helper function checks whether there are enough free pebs (deducted
107  * there is at least one of free pebs is filled into fm_wl_pool.
108  * For wear leveling pool, UBI should also reserve free pebs for bad pebs
109  * handling, because there maybe no enough free pebs for user volumes after
117 	if (!ubi->free.rb_node)  in has_enough_free_count()
147 		wl_tree_add(ubi->fm_anchor, &ubi->free);  in ubi_refill_pools()
154 		 * All available PEBs are in ubi->free, now is the time to get  in ubi_refill_pools()
178 			e = find_wl_entry(ubi, &ubi->free, WL_FREE_MAX_DIFF);  in ubi_refill_pools()
179 			self_check_in_wl_tree(ubi, e, &ubi->free);  in ubi_refill_pools()
180 			rb_erase(&e->u.rb, &ubi->free);  in ubi_refill_pools()
199  * produce_free_peb - produce a free physical eraseblock.
202  * This function tries to make a free PEB by means of synchronous execution of
211 	while (!ubi->free.rb_node && ubi->works_count) {  in produce_free_peb()
259 			ubi_err(ubi, "Unable to get a free PEB from user WL pool");  in ubi_wl_get_peb()
313  * UBI fetches free PEB from wl_pool, we check free PEBs from both 'wl_pool'
314  * and 'ubi->free', because free PEB in 'ubi->free' tree maybe moved into
329 		if (!ubi->free.rb_node)  in need_wear_leveling()
331 		e = find_wl_entry(ubi, &ubi->free, WL_FREE_MAX_DIFF);  in need_wear_leveling()
335 		if (ubi->free.rb_node) {  in need_wear_leveling()
336 			e = find_wl_entry(ubi, &ubi->free, WL_FREE_MAX_DIFF);  in need_wear_leveling()
388 	/* See if we can find an anchor PEB on the list of free PEBs */  in ubi_ensure_anchor_pebs()