763 		struct ext4_prealloc_space *pa;  in __mb_check_buddy()  local
764 		pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list);  in __mb_check_buddy()
765 		ext4_get_group_no_and_offset(sb, pa->pa_pstart, &groupnr, &k);  in __mb_check_buddy()
767 		for (i = 0; i < pa->pa_len; i++)  in __mb_check_buddy()
3747 	struct ext4_prealloc_space *pa;  in ext4_mb_cleanup_pa()  local
3752 		pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list);  in ext4_mb_cleanup_pa()
3753 		list_del(&pa->pa_group_list);  in ext4_mb_cleanup_pa()
3755 		kmem_cache_free(ext4_pspace_cachep, pa);  in ext4_mb_cleanup_pa()
4644 	struct ext4_prealloc_space *pa = ac->ac_pa;  in ext4_discard_allocated_blocks()  local
4648 	if (pa == NULL) {  in ext4_discard_allocated_blocks()
4667 	if (pa->pa_type == MB_INODE_PA) {  in ext4_discard_allocated_blocks()
4668 		spin_lock(&pa->pa_lock);  in ext4_discard_allocated_blocks()
4669 		pa->pa_free += ac->ac_b_ex.fe_len;  in ext4_discard_allocated_blocks()
4670 		spin_unlock(&pa->pa_lock);  in ext4_discard_allocated_blocks()
4678 				struct ext4_prealloc_space *pa)  in ext4_mb_use_inode_pa()  argument
4686 	start = pa->pa_pstart + (ac->ac_o_ex.fe_logical - pa->pa_lstart);  in ext4_mb_use_inode_pa()
4687 	end = min(pa->pa_pstart + EXT4_C2B(sbi, pa->pa_len),  in ext4_mb_use_inode_pa()
4694 	ac->ac_pa = pa;  in ext4_mb_use_inode_pa()
4696 	BUG_ON(start < pa->pa_pstart);  in ext4_mb_use_inode_pa()
4697 	BUG_ON(end > pa->pa_pstart + EXT4_C2B(sbi, pa->pa_len));  in ext4_mb_use_inode_pa()
4698 	BUG_ON(pa->pa_free < len);  in ext4_mb_use_inode_pa()
4700 	pa->pa_free -= len;  in ext4_mb_use_inode_pa()
4702 	mb_debug(ac->ac_sb, "use %llu/%d from inode pa %p\n", start, len, pa);  in ext4_mb_use_inode_pa()
4709 				struct ext4_prealloc_space *pa)  in ext4_mb_use_group_pa()  argument
4713 	ext4_get_group_no_and_offset(ac->ac_sb, pa->pa_pstart,  in ext4_mb_use_group_pa()
4718 	ac->ac_pa = pa;  in ext4_mb_use_group_pa()
4727 		 pa->pa_lstart, len, pa);  in ext4_mb_use_group_pa()
4738 			struct ext4_prealloc_space *pa,  in ext4_mb_check_group_pa()  argument
4744 		atomic_inc(&pa->pa_count);  in ext4_mb_check_group_pa()
4745 		return pa;  in ext4_mb_check_group_pa()
4748 	new_distance = abs(goal_block - pa->pa_pstart);  in ext4_mb_check_group_pa()
4755 	atomic_inc(&pa->pa_count);  in ext4_mb_check_group_pa()
4756 	return pa;  in ext4_mb_check_group_pa()
4764 		      struct ext4_prealloc_space *pa)  in ext4_mb_pa_goal_check()  argument
4778 	start = pa->pa_pstart +  in ext4_mb_pa_goal_check()
4779 		(ac->ac_g_ex.fe_logical - pa->pa_lstart);  in ext4_mb_pa_goal_check()
4783 	if (ac->ac_g_ex.fe_len > pa->pa_len -  in ext4_mb_pa_goal_check()
4784 	    EXT4_B2C(sbi, ac->ac_g_ex.fe_logical - pa->pa_lstart))  in ext4_mb_pa_goal_check()
5003 	struct ext4_prealloc_space *pa;  in ext4_mb_generate_from_pa()  local
5022 		pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list);  in ext4_mb_generate_from_pa()
5023 		spin_lock(&pa->pa_lock);  in ext4_mb_generate_from_pa()
5024 		ext4_get_group_no_and_offset(sb, pa->pa_pstart,  in ext4_mb_generate_from_pa()
5026 		len = pa->pa_len;  in ext4_mb_generate_from_pa()
5027 		spin_unlock(&pa->pa_lock);  in ext4_mb_generate_from_pa()
5038 				    struct ext4_prealloc_space *pa)  in ext4_mb_mark_pa_deleted()  argument
5042 	if (pa->pa_deleted) {  in ext4_mb_mark_pa_deleted()
5044 			     pa->pa_type, pa->pa_pstart, pa->pa_lstart,  in ext4_mb_mark_pa_deleted()
5045 			     pa->pa_len);  in ext4_mb_mark_pa_deleted()
5049 	pa->pa_deleted = 1;  in ext4_mb_mark_pa_deleted()
5051 	if (pa->pa_type == MB_INODE_PA) {  in ext4_mb_mark_pa_deleted()
5052 		ei = EXT4_I(pa->pa_inode);  in ext4_mb_mark_pa_deleted()
5057 static inline void ext4_mb_pa_free(struct ext4_prealloc_space *pa)  in ext4_mb_pa_free()  argument
5059 	BUG_ON(!pa);  in ext4_mb_pa_free()
5060 	BUG_ON(atomic_read(&pa->pa_count));  in ext4_mb_pa_free()
5061 	BUG_ON(pa->pa_deleted == 0);  in ext4_mb_pa_free()
5062 	kmem_cache_free(ext4_pspace_cachep, pa);  in ext4_mb_pa_free()
5067 	struct ext4_prealloc_space *pa;  in ext4_mb_pa_callback()  local
5069 	pa = container_of(head, struct ext4_prealloc_space, u.pa_rcu);  in ext4_mb_pa_callback()
5070 	ext4_mb_pa_free(pa);  in ext4_mb_pa_callback()
5078 			struct super_block *sb, struct ext4_prealloc_space *pa)  in ext4_mb_put_pa()  argument
5085 	spin_lock(&pa->pa_lock);  in ext4_mb_put_pa()
5086 	if (!atomic_dec_and_test(&pa->pa_count) || pa->pa_free != 0) {  in ext4_mb_put_pa()
5087 		spin_unlock(&pa->pa_lock);  in ext4_mb_put_pa()
5091 	if (pa->pa_deleted == 1) {  in ext4_mb_put_pa()
5092 		spin_unlock(&pa->pa_lock);  in ext4_mb_put_pa()
5096 	ext4_mb_mark_pa_deleted(sb, pa);  in ext4_mb_put_pa()
5097 	spin_unlock(&pa->pa_lock);  in ext4_mb_put_pa()
5099 	grp_blk = pa->pa_pstart;  in ext4_mb_put_pa()
5104 	if (pa->pa_type == MB_GROUP_PA)  in ext4_mb_put_pa()
5124 	list_del(&pa->pa_group_list);  in ext4_mb_put_pa()
5127 	if (pa->pa_type == MB_INODE_PA) {  in ext4_mb_put_pa()
5128 		write_lock(pa->pa_node_lock.inode_lock);  in ext4_mb_put_pa()
5129 		rb_erase(&pa->pa_node.inode_node, &ei->i_prealloc_node);  in ext4_mb_put_pa()
5130 		write_unlock(pa->pa_node_lock.inode_lock);  in ext4_mb_put_pa()
5131 		ext4_mb_pa_free(pa);  in ext4_mb_put_pa()
5133 		spin_lock(pa->pa_node_lock.lg_lock);  in ext4_mb_put_pa()
5134 		list_del_rcu(&pa->pa_node.lg_list);  in ext4_mb_put_pa()
5135 		spin_unlock(pa->pa_node_lock.lg_lock);  in ext4_mb_put_pa()
5136 		call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback);  in ext4_mb_put_pa()
5173 	struct ext4_prealloc_space *pa;  in ext4_mb_new_inode_pa()  local
5183 	pa = ac->ac_pa;  in ext4_mb_new_inode_pa()
5233 	pa->pa_lstart = ac->ac_b_ex.fe_logical;  in ext4_mb_new_inode_pa()
5234 	pa->pa_pstart = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);  in ext4_mb_new_inode_pa()
5235 	pa->pa_len = ac->ac_b_ex.fe_len;  in ext4_mb_new_inode_pa()
5236 	pa->pa_free = pa->pa_len;  in ext4_mb_new_inode_pa()
5237 	spin_lock_init(&pa->pa_lock);  in ext4_mb_new_inode_pa()
5238 	INIT_LIST_HEAD(&pa->pa_group_list);  in ext4_mb_new_inode_pa()
5239 	pa->pa_deleted = 0;  in ext4_mb_new_inode_pa()
5240 	pa->pa_type = MB_INODE_PA;  in ext4_mb_new_inode_pa()
5242 	mb_debug(sb, "new inode pa %p: %llu/%d for %u\n", pa, pa->pa_pstart,  in ext4_mb_new_inode_pa()
5243 		 pa->pa_len, pa->pa_lstart);  in ext4_mb_new_inode_pa()
5244 	trace_ext4_mb_new_inode_pa(ac, pa);  in ext4_mb_new_inode_pa()
5246 	atomic_add(pa->pa_free, &sbi->s_mb_preallocated);  in ext4_mb_new_inode_pa()
5247 	ext4_mb_use_inode_pa(ac, pa);  in ext4_mb_new_inode_pa()
5254 	pa->pa_node_lock.inode_lock = &ei->i_prealloc_lock;  in ext4_mb_new_inode_pa()
5255 	pa->pa_inode = ac->ac_inode;  in ext4_mb_new_inode_pa()
5257 	list_add(&pa->pa_group_list, &grp->bb_prealloc_list);  in ext4_mb_new_inode_pa()
5259 	write_lock(pa->pa_node_lock.inode_lock);  in ext4_mb_new_inode_pa()
5260 	ext4_mb_pa_rb_insert(&ei->i_prealloc_node, &pa->pa_node.inode_node);  in ext4_mb_new_inode_pa()
5261 	write_unlock(pa->pa_node_lock.inode_lock);  in ext4_mb_new_inode_pa()
5273 	struct ext4_prealloc_space *pa;  in ext4_mb_new_group_pa()  local
5282 	pa = ac->ac_pa;  in ext4_mb_new_group_pa()
5284 	pa->pa_pstart = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);  in ext4_mb_new_group_pa()
5285 	pa->pa_lstart = pa->pa_pstart;  in ext4_mb_new_group_pa()
5286 	pa->pa_len = ac->ac_b_ex.fe_len;  in ext4_mb_new_group_pa()
5287 	pa->pa_free = pa->pa_len;  in ext4_mb_new_group_pa()
5288 	spin_lock_init(&pa->pa_lock);  in ext4_mb_new_group_pa()
5289 	INIT_LIST_HEAD(&pa->pa_node.lg_list);  in ext4_mb_new_group_pa()
5290 	INIT_LIST_HEAD(&pa->pa_group_list);  in ext4_mb_new_group_pa()
5291 	pa->pa_deleted = 0;  in ext4_mb_new_group_pa()
5292 	pa->pa_type = MB_GROUP_PA;  in ext4_mb_new_group_pa()
5294 	mb_debug(sb, "new group pa %p: %llu/%d for %u\n", pa, pa->pa_pstart,  in ext4_mb_new_group_pa()
5295 		 pa->pa_len, pa->pa_lstart);  in ext4_mb_new_group_pa()
5296 	trace_ext4_mb_new_group_pa(ac, pa);  in ext4_mb_new_group_pa()
5298 	ext4_mb_use_group_pa(ac, pa);  in ext4_mb_new_group_pa()
5299 	atomic_add(pa->pa_free, &EXT4_SB(sb)->s_mb_preallocated);  in ext4_mb_new_group_pa()
5307 	pa->pa_node_lock.lg_lock = &lg->lg_prealloc_lock;  in ext4_mb_new_group_pa()
5308 	pa->pa_inode = NULL;  in ext4_mb_new_group_pa()
5310 	list_add(&pa->pa_group_list, &grp->bb_prealloc_list);  in ext4_mb_new_group_pa()
5336 			struct ext4_prealloc_space *pa)  in ext4_mb_release_inode_pa()  argument
5347 	BUG_ON(pa->pa_deleted == 0);  in ext4_mb_release_inode_pa()
5348 	ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, &bit);  in ext4_mb_release_inode_pa()
5349 	grp_blk_start = pa->pa_pstart - EXT4_C2B(sbi, bit);  in ext4_mb_release_inode_pa()
5350 	BUG_ON(group != e4b->bd_group && pa->pa_len != 0);  in ext4_mb_release_inode_pa()
5351 	end = bit + pa->pa_len;  in ext4_mb_release_inode_pa()
5364 		trace_ext4_mb_release_inode_pa(pa, (grp_blk_start +  in ext4_mb_release_inode_pa()
5367 		mb_free_blocks(pa->pa_inode, e4b, bit, next - bit);  in ext4_mb_release_inode_pa()
5370 	if (free != pa->pa_free) {  in ext4_mb_release_inode_pa()
5373 			 pa, (unsigned long) pa->pa_lstart,  in ext4_mb_release_inode_pa()
5374 			 (unsigned long) pa->pa_pstart,  in ext4_mb_release_inode_pa()
5375 			 pa->pa_len);  in ext4_mb_release_inode_pa()
5377 					free, pa->pa_free);  in ext4_mb_release_inode_pa()
5390 				struct ext4_prealloc_space *pa)  in ext4_mb_release_group_pa()  argument
5396 	trace_ext4_mb_release_group_pa(sb, pa);  in ext4_mb_release_group_pa()
5397 	BUG_ON(pa->pa_deleted == 0);  in ext4_mb_release_group_pa()
5398 	ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, &bit);  in ext4_mb_release_group_pa()
5399 	if (unlikely(group != e4b->bd_group && pa->pa_len != 0)) {  in ext4_mb_release_group_pa()
5401 			     e4b->bd_group, group, pa->pa_pstart);  in ext4_mb_release_group_pa()
5404 	mb_free_blocks(pa->pa_inode, e4b, bit, pa->pa_len);  in ext4_mb_release_group_pa()
5405 	atomic_add(pa->pa_len, &EXT4_SB(sb)->s_mb_discarded);  in ext4_mb_release_group_pa()
5406 	trace_ext4_mballoc_discard(sb, NULL, group, bit, pa->pa_len);  in ext4_mb_release_group_pa()
5426 	struct ext4_prealloc_space *pa, *tmp;  in ext4_mb_discard_group_preallocations()  local
5457 	list_for_each_entry_safe(pa, tmp,  in ext4_mb_discard_group_preallocations()
5459 		spin_lock(&pa->pa_lock);  in ext4_mb_discard_group_preallocations()
5460 		if (atomic_read(&pa->pa_count)) {  in ext4_mb_discard_group_preallocations()
5461 			spin_unlock(&pa->pa_lock);  in ext4_mb_discard_group_preallocations()
5465 		if (pa->pa_deleted) {  in ext4_mb_discard_group_preallocations()
5466 			spin_unlock(&pa->pa_lock);  in ext4_mb_discard_group_preallocations()
5471 		ext4_mb_mark_pa_deleted(sb, pa);  in ext4_mb_discard_group_preallocations()
5477 		free += pa->pa_free;  in ext4_mb_discard_group_preallocations()
5479 		spin_unlock(&pa->pa_lock);  in ext4_mb_discard_group_preallocations()
5481 		list_del(&pa->pa_group_list);  in ext4_mb_discard_group_preallocations()
5482 		list_add(&pa->u.pa_tmp_list, &list);  in ext4_mb_discard_group_preallocations()
5486 	list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) {  in ext4_mb_discard_group_preallocations()
5489 		if (pa->pa_type == MB_GROUP_PA) {  in ext4_mb_discard_group_preallocations()
5490 			spin_lock(pa->pa_node_lock.lg_lock);  in ext4_mb_discard_group_preallocations()
5491 			list_del_rcu(&pa->pa_node.lg_list);  in ext4_mb_discard_group_preallocations()
5492 			spin_unlock(pa->pa_node_lock.lg_lock);  in ext4_mb_discard_group_preallocations()
5494 			write_lock(pa->pa_node_lock.inode_lock);  in ext4_mb_discard_group_preallocations()
5495 			ei = EXT4_I(pa->pa_inode);  in ext4_mb_discard_group_preallocations()
5496 			rb_erase(&pa->pa_node.inode_node, &ei->i_prealloc_node);  in ext4_mb_discard_group_preallocations()
5497 			write_unlock(pa->pa_node_lock.inode_lock);  in ext4_mb_discard_group_preallocations()
5500 		list_del(&pa->u.pa_tmp_list);  in ext4_mb_discard_group_preallocations()
5502 		if (pa->pa_type == MB_GROUP_PA) {  in ext4_mb_discard_group_preallocations()
5503 			ext4_mb_release_group_pa(&e4b, pa);  in ext4_mb_discard_group_preallocations()
5504 			call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback);  in ext4_mb_discard_group_preallocations()
5506 			ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa);  in ext4_mb_discard_group_preallocations()
5507 			ext4_mb_pa_free(pa);  in ext4_mb_discard_group_preallocations()
5534 	struct ext4_prealloc_space *pa, *tmp;  in ext4_discard_preallocations()  local
5561 		pa = rb_entry(iter, struct ext4_prealloc_space,  in ext4_discard_preallocations()
5563 		BUG_ON(pa->pa_node_lock.inode_lock != &ei->i_prealloc_lock);  in ext4_discard_preallocations()
5565 		spin_lock(&pa->pa_lock);  in ext4_discard_preallocations()
5566 		if (atomic_read(&pa->pa_count)) {  in ext4_discard_preallocations()
5569 			spin_unlock(&pa->pa_lock);  in ext4_discard_preallocations()
5578 		if (pa->pa_deleted == 0) {  in ext4_discard_preallocations()
5579 			ext4_mb_mark_pa_deleted(sb, pa);  in ext4_discard_preallocations()
5580 			spin_unlock(&pa->pa_lock);  in ext4_discard_preallocations()
5581 			rb_erase(&pa->pa_node.inode_node, &ei->i_prealloc_node);  in ext4_discard_preallocations()
5582 			list_add(&pa->u.pa_tmp_list, &list);  in ext4_discard_preallocations()
5588 		spin_unlock(&pa->pa_lock);  in ext4_discard_preallocations()
5608 	list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) {  in ext4_discard_preallocations()
5609 		BUG_ON(pa->pa_type != MB_INODE_PA);  in ext4_discard_preallocations()
5610 		group = ext4_get_group_number(sb, pa->pa_pstart);  in ext4_discard_preallocations()
5630 		list_del(&pa->pa_group_list);  in ext4_discard_preallocations()
5631 		ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa);  in ext4_discard_preallocations()
5637 		list_del(&pa->u.pa_tmp_list);  in ext4_discard_preallocations()
5638 		ext4_mb_pa_free(pa);  in ext4_discard_preallocations()
5644 	struct ext4_prealloc_space *pa;  in ext4_mb_pa_alloc()  local
5647 	pa = kmem_cache_zalloc(ext4_pspace_cachep, GFP_NOFS);  in ext4_mb_pa_alloc()
5648 	if (!pa)  in ext4_mb_pa_alloc()
5650 	atomic_set(&pa->pa_count, 1);  in ext4_mb_pa_alloc()
5651 	ac->ac_pa = pa;  in ext4_mb_pa_alloc()
5657 	struct ext4_prealloc_space *pa = ac->ac_pa;  in ext4_mb_pa_put_free()  local
5659 	BUG_ON(!pa);  in ext4_mb_pa_put_free()
5661 	WARN_ON(!atomic_dec_and_test(&pa->pa_count));  in ext4_mb_pa_put_free()
5667 	pa->pa_deleted = 1;  in ext4_mb_pa_put_free()
5668 	ext4_mb_pa_free(pa);  in ext4_mb_pa_put_free()
5683 		struct ext4_prealloc_space *pa;  in ext4_mb_show_pa()  local
5691 			pa = list_entry(cur, struct ext4_prealloc_space,  in ext4_mb_show_pa()
5693 			spin_lock(&pa->pa_lock);  in ext4_mb_show_pa()
5694 			ext4_get_group_no_and_offset(sb, pa->pa_pstart,  in ext4_mb_show_pa()
5696 			spin_unlock(&pa->pa_lock);  in ext4_mb_show_pa()
5698 				 pa->pa_len);  in ext4_mb_show_pa()
5869 	struct ext4_prealloc_space *pa, *tmp;  in ext4_mb_discard_lg_preallocations()  local
5874 	list_for_each_entry_rcu(pa, &lg->lg_prealloc_list[order],  in ext4_mb_discard_lg_preallocations()
5877 		spin_lock(&pa->pa_lock);  in ext4_mb_discard_lg_preallocations()
5878 		if (atomic_read(&pa->pa_count)) {  in ext4_mb_discard_lg_preallocations()
5884 			spin_unlock(&pa->pa_lock);  in ext4_mb_discard_lg_preallocations()
5887 		if (pa->pa_deleted) {  in ext4_mb_discard_lg_preallocations()
5888 			spin_unlock(&pa->pa_lock);  in ext4_mb_discard_lg_preallocations()
5892 		BUG_ON(pa->pa_type != MB_GROUP_PA);  in ext4_mb_discard_lg_preallocations()
5895 		ext4_mb_mark_pa_deleted(sb, pa);  in ext4_mb_discard_lg_preallocations()
5896 		spin_unlock(&pa->pa_lock);  in ext4_mb_discard_lg_preallocations()
5898 		list_del_rcu(&pa->pa_node.lg_list);  in ext4_mb_discard_lg_preallocations()
5899 		list_add(&pa->u.pa_tmp_list, &discard_list);  in ext4_mb_discard_lg_preallocations()
5914 	list_for_each_entry_safe(pa, tmp, &discard_list, u.pa_tmp_list) {  in ext4_mb_discard_lg_preallocations()
5917 		group = ext4_get_group_number(sb, pa->pa_pstart);  in ext4_mb_discard_lg_preallocations()
5926 		list_del(&pa->pa_group_list);  in ext4_mb_discard_lg_preallocations()
5927 		ext4_mb_release_group_pa(&e4b, pa);  in ext4_mb_discard_lg_preallocations()
5931 		list_del(&pa->u.pa_tmp_list);  in ext4_mb_discard_lg_preallocations()
5932 		call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback);  in ext4_mb_discard_lg_preallocations()
5950 	struct ext4_prealloc_space *tmp_pa, *pa = ac->ac_pa;  in ext4_mb_add_n_trim()  local
5952 	order = fls(pa->pa_free) - 1;  in ext4_mb_add_n_trim()
5966 		if (!added && pa->pa_free < tmp_pa->pa_free) {  in ext4_mb_add_n_trim()
5968 			list_add_tail_rcu(&pa->pa_node.lg_list,  in ext4_mb_add_n_trim()
5980 		list_add_tail_rcu(&pa->pa_node.lg_list,  in ext4_mb_add_n_trim()
5996 	struct ext4_prealloc_space *pa = ac->ac_pa;  in ext4_mb_release_context()  local
5997 	if (pa) {  in ext4_mb_release_context()
5998 		if (pa->pa_type == MB_GROUP_PA) {  in ext4_mb_release_context()
6000 			spin_lock(&pa->pa_lock);  in ext4_mb_release_context()
6001 			pa->pa_pstart += EXT4_C2B(sbi, ac->ac_b_ex.fe_len);  in ext4_mb_release_context()
6002 			pa->pa_lstart += EXT4_C2B(sbi, ac->ac_b_ex.fe_len);  in ext4_mb_release_context()
6003 			pa->pa_free -= ac->ac_b_ex.fe_len;  in ext4_mb_release_context()
6004 			pa->pa_len -= ac->ac_b_ex.fe_len;  in ext4_mb_release_context()
6005 			spin_unlock(&pa->pa_lock);  in ext4_mb_release_context()
6013 			if (likely(pa->pa_free)) {  in ext4_mb_release_context()
6014 				spin_lock(pa->pa_node_lock.lg_lock);  in ext4_mb_release_context()
6015 				list_del_rcu(&pa->pa_node.lg_list);  in ext4_mb_release_context()
6016 				spin_unlock(pa->pa_node_lock.lg_lock);  in ext4_mb_release_context()
6021 		ext4_mb_put_pa(ac, ac->ac_sb, pa);  in ext4_mb_release_context()