765 		struct ext4_prealloc_space *pa;  in __mb_check_buddy()  local
766 		pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list);  in __mb_check_buddy()
767 		ext4_get_group_no_and_offset(sb, pa->pa_pstart, &groupnr, &k);  in __mb_check_buddy()
769 		for (i = 0; i < pa->pa_len; i++)  in __mb_check_buddy()
3716 	struct ext4_prealloc_space *pa;  in ext4_mb_cleanup_pa()  local
3721 		pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list);  in ext4_mb_cleanup_pa()
3722 		list_del(&pa->pa_group_list);  in ext4_mb_cleanup_pa()
3724 		kmem_cache_free(ext4_pspace_cachep, pa);  in ext4_mb_cleanup_pa()
4612 	struct ext4_prealloc_space *pa = ac->ac_pa;  in ext4_discard_allocated_blocks()  local
4616 	if (pa == NULL) {  in ext4_discard_allocated_blocks()
4635 	if (pa->pa_type == MB_INODE_PA) {  in ext4_discard_allocated_blocks()
4636 		spin_lock(&pa->pa_lock);  in ext4_discard_allocated_blocks()
4637 		pa->pa_free += ac->ac_b_ex.fe_len;  in ext4_discard_allocated_blocks()
4638 		spin_unlock(&pa->pa_lock);  in ext4_discard_allocated_blocks()
4646 				struct ext4_prealloc_space *pa)  in ext4_mb_use_inode_pa()  argument
4654 	start = pa->pa_pstart + (ac->ac_o_ex.fe_logical - pa->pa_lstart);  in ext4_mb_use_inode_pa()
4655 	end = min(pa->pa_pstart + EXT4_C2B(sbi, pa->pa_len),  in ext4_mb_use_inode_pa()
4662 	ac->ac_pa = pa;  in ext4_mb_use_inode_pa()
4664 	BUG_ON(start < pa->pa_pstart);  in ext4_mb_use_inode_pa()
4665 	BUG_ON(end > pa->pa_pstart + EXT4_C2B(sbi, pa->pa_len));  in ext4_mb_use_inode_pa()
4666 	BUG_ON(pa->pa_free < len);  in ext4_mb_use_inode_pa()
4668 	pa->pa_free -= len;  in ext4_mb_use_inode_pa()
4670 	mb_debug(ac->ac_sb, "use %llu/%d from inode pa %p\n", start, len, pa);  in ext4_mb_use_inode_pa()
4677 				struct ext4_prealloc_space *pa)  in ext4_mb_use_group_pa()  argument
4681 	ext4_get_group_no_and_offset(ac->ac_sb, pa->pa_pstart,  in ext4_mb_use_group_pa()
4686 	ac->ac_pa = pa;  in ext4_mb_use_group_pa()
4695 		 pa->pa_lstart, len, pa);  in ext4_mb_use_group_pa()
4706 			struct ext4_prealloc_space *pa,  in ext4_mb_check_group_pa()  argument
4712 		atomic_inc(&pa->pa_count);  in ext4_mb_check_group_pa()
4713 		return pa;  in ext4_mb_check_group_pa()
4716 	new_distance = abs(goal_block - pa->pa_pstart);  in ext4_mb_check_group_pa()
4723 	atomic_inc(&pa->pa_count);  in ext4_mb_check_group_pa()
4724 	return pa;  in ext4_mb_check_group_pa()
4732 		      struct ext4_prealloc_space *pa)  in ext4_mb_pa_goal_check()  argument
4746 	start = pa->pa_pstart +  in ext4_mb_pa_goal_check()
4747 		(ac->ac_g_ex.fe_logical - pa->pa_lstart);  in ext4_mb_pa_goal_check()
4751 	if (ac->ac_g_ex.fe_len > pa->pa_len -  in ext4_mb_pa_goal_check()
4752 	    EXT4_B2C(sbi, ac->ac_g_ex.fe_logical - pa->pa_lstart))  in ext4_mb_pa_goal_check()
4996 	struct ext4_prealloc_space *pa;  in ext4_mb_generate_from_pa()  local
5015 		pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list);  in ext4_mb_generate_from_pa()
5016 		spin_lock(&pa->pa_lock);  in ext4_mb_generate_from_pa()
5017 		ext4_get_group_no_and_offset(sb, pa->pa_pstart,  in ext4_mb_generate_from_pa()
5019 		len = pa->pa_len;  in ext4_mb_generate_from_pa()
5020 		spin_unlock(&pa->pa_lock);  in ext4_mb_generate_from_pa()
5031 				    struct ext4_prealloc_space *pa)  in ext4_mb_mark_pa_deleted()  argument
5035 	if (pa->pa_deleted) {  in ext4_mb_mark_pa_deleted()
5037 			     pa->pa_type, pa->pa_pstart, pa->pa_lstart,  in ext4_mb_mark_pa_deleted()
5038 			     pa->pa_len);  in ext4_mb_mark_pa_deleted()
5042 	pa->pa_deleted = 1;  in ext4_mb_mark_pa_deleted()
5044 	if (pa->pa_type == MB_INODE_PA) {  in ext4_mb_mark_pa_deleted()
5045 		ei = EXT4_I(pa->pa_inode);  in ext4_mb_mark_pa_deleted()
5050 static inline void ext4_mb_pa_free(struct ext4_prealloc_space *pa)  in ext4_mb_pa_free()  argument
5052 	BUG_ON(!pa);  in ext4_mb_pa_free()
5053 	BUG_ON(atomic_read(&pa->pa_count));  in ext4_mb_pa_free()
5054 	BUG_ON(pa->pa_deleted == 0);  in ext4_mb_pa_free()
5055 	kmem_cache_free(ext4_pspace_cachep, pa);  in ext4_mb_pa_free()
5060 	struct ext4_prealloc_space *pa;  in ext4_mb_pa_callback()  local
5062 	pa = container_of(head, struct ext4_prealloc_space, u.pa_rcu);  in ext4_mb_pa_callback()
5063 	ext4_mb_pa_free(pa);  in ext4_mb_pa_callback()
5071 			struct super_block *sb, struct ext4_prealloc_space *pa)  in ext4_mb_put_pa()  argument
5078 	spin_lock(&pa->pa_lock);  in ext4_mb_put_pa()
5079 	if (!atomic_dec_and_test(&pa->pa_count) || pa->pa_free != 0) {  in ext4_mb_put_pa()
5080 		spin_unlock(&pa->pa_lock);  in ext4_mb_put_pa()
5084 	if (pa->pa_deleted == 1) {  in ext4_mb_put_pa()
5085 		spin_unlock(&pa->pa_lock);  in ext4_mb_put_pa()
5089 	ext4_mb_mark_pa_deleted(sb, pa);  in ext4_mb_put_pa()
5090 	spin_unlock(&pa->pa_lock);  in ext4_mb_put_pa()
5092 	grp_blk = pa->pa_pstart;  in ext4_mb_put_pa()
5097 	if (pa->pa_type == MB_GROUP_PA)  in ext4_mb_put_pa()
5117 	list_del(&pa->pa_group_list);  in ext4_mb_put_pa()
5120 	if (pa->pa_type == MB_INODE_PA) {  in ext4_mb_put_pa()
5121 		write_lock(pa->pa_node_lock.inode_lock);  in ext4_mb_put_pa()
5122 		rb_erase(&pa->pa_node.inode_node, &ei->i_prealloc_node);  in ext4_mb_put_pa()
5123 		write_unlock(pa->pa_node_lock.inode_lock);  in ext4_mb_put_pa()
5124 		ext4_mb_pa_free(pa);  in ext4_mb_put_pa()
5126 		spin_lock(pa->pa_node_lock.lg_lock);  in ext4_mb_put_pa()
5127 		list_del_rcu(&pa->pa_node.lg_list);  in ext4_mb_put_pa()
5128 		spin_unlock(pa->pa_node_lock.lg_lock);  in ext4_mb_put_pa()
5129 		call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback);  in ext4_mb_put_pa()
5166 	struct ext4_prealloc_space *pa;  in ext4_mb_new_inode_pa()  local
5176 	pa = ac->ac_pa;  in ext4_mb_new_inode_pa()
5221 	pa->pa_lstart = ac->ac_b_ex.fe_logical;  in ext4_mb_new_inode_pa()
5222 	pa->pa_pstart = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);  in ext4_mb_new_inode_pa()
5223 	pa->pa_len = ac->ac_b_ex.fe_len;  in ext4_mb_new_inode_pa()
5224 	pa->pa_free = pa->pa_len;  in ext4_mb_new_inode_pa()
5225 	spin_lock_init(&pa->pa_lock);  in ext4_mb_new_inode_pa()
5226 	INIT_LIST_HEAD(&pa->pa_group_list);  in ext4_mb_new_inode_pa()
5227 	pa->pa_deleted = 0;  in ext4_mb_new_inode_pa()
5228 	pa->pa_type = MB_INODE_PA;  in ext4_mb_new_inode_pa()
5230 	mb_debug(sb, "new inode pa %p: %llu/%d for %u\n", pa, pa->pa_pstart,  in ext4_mb_new_inode_pa()
5231 		 pa->pa_len, pa->pa_lstart);  in ext4_mb_new_inode_pa()
5232 	trace_ext4_mb_new_inode_pa(ac, pa);  in ext4_mb_new_inode_pa()
5234 	atomic_add(pa->pa_free, &sbi->s_mb_preallocated);  in ext4_mb_new_inode_pa()
5235 	ext4_mb_use_inode_pa(ac, pa);  in ext4_mb_new_inode_pa()
5242 	pa->pa_node_lock.inode_lock = &ei->i_prealloc_lock;  in ext4_mb_new_inode_pa()
5243 	pa->pa_inode = ac->ac_inode;  in ext4_mb_new_inode_pa()
5245 	list_add(&pa->pa_group_list, &grp->bb_prealloc_list);  in ext4_mb_new_inode_pa()
5247 	write_lock(pa->pa_node_lock.inode_lock);  in ext4_mb_new_inode_pa()
5248 	ext4_mb_pa_rb_insert(&ei->i_prealloc_node, &pa->pa_node.inode_node);  in ext4_mb_new_inode_pa()
5249 	write_unlock(pa->pa_node_lock.inode_lock);  in ext4_mb_new_inode_pa()
5261 	struct ext4_prealloc_space *pa;  in ext4_mb_new_group_pa()  local
5270 	pa = ac->ac_pa;  in ext4_mb_new_group_pa()
5272 	pa->pa_pstart = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);  in ext4_mb_new_group_pa()
5273 	pa->pa_lstart = pa->pa_pstart;  in ext4_mb_new_group_pa()
5274 	pa->pa_len = ac->ac_b_ex.fe_len;  in ext4_mb_new_group_pa()
5275 	pa->pa_free = pa->pa_len;  in ext4_mb_new_group_pa()
5276 	spin_lock_init(&pa->pa_lock);  in ext4_mb_new_group_pa()
5277 	INIT_LIST_HEAD(&pa->pa_node.lg_list);  in ext4_mb_new_group_pa()
5278 	INIT_LIST_HEAD(&pa->pa_group_list);  in ext4_mb_new_group_pa()
5279 	pa->pa_deleted = 0;  in ext4_mb_new_group_pa()
5280 	pa->pa_type = MB_GROUP_PA;  in ext4_mb_new_group_pa()
5282 	mb_debug(sb, "new group pa %p: %llu/%d for %u\n", pa, pa->pa_pstart,  in ext4_mb_new_group_pa()
5283 		 pa->pa_len, pa->pa_lstart);  in ext4_mb_new_group_pa()
5284 	trace_ext4_mb_new_group_pa(ac, pa);  in ext4_mb_new_group_pa()
5286 	ext4_mb_use_group_pa(ac, pa);  in ext4_mb_new_group_pa()
5287 	atomic_add(pa->pa_free, &EXT4_SB(sb)->s_mb_preallocated);  in ext4_mb_new_group_pa()
5295 	pa->pa_node_lock.lg_lock = &lg->lg_prealloc_lock;  in ext4_mb_new_group_pa()
5296 	pa->pa_inode = NULL;  in ext4_mb_new_group_pa()
5298 	list_add(&pa->pa_group_list, &grp->bb_prealloc_list);  in ext4_mb_new_group_pa()
5324 			struct ext4_prealloc_space *pa)  in ext4_mb_release_inode_pa()  argument
5335 	BUG_ON(pa->pa_deleted == 0);  in ext4_mb_release_inode_pa()
5336 	ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, &bit);  in ext4_mb_release_inode_pa()
5337 	grp_blk_start = pa->pa_pstart - EXT4_C2B(sbi, bit);  in ext4_mb_release_inode_pa()
5338 	BUG_ON(group != e4b->bd_group && pa->pa_len != 0);  in ext4_mb_release_inode_pa()
5339 	end = bit + pa->pa_len;  in ext4_mb_release_inode_pa()
5352 		trace_ext4_mb_release_inode_pa(pa, (grp_blk_start +  in ext4_mb_release_inode_pa()
5355 		mb_free_blocks(pa->pa_inode, e4b, bit, next - bit);  in ext4_mb_release_inode_pa()
5358 	if (free != pa->pa_free) {  in ext4_mb_release_inode_pa()
5361 			 pa, (unsigned long) pa->pa_lstart,  in ext4_mb_release_inode_pa()
5362 			 (unsigned long) pa->pa_pstart,  in ext4_mb_release_inode_pa()
5363 			 pa->pa_len);  in ext4_mb_release_inode_pa()
5365 					free, pa->pa_free);  in ext4_mb_release_inode_pa()
5378 				struct ext4_prealloc_space *pa)  in ext4_mb_release_group_pa()  argument
5384 	trace_ext4_mb_release_group_pa(sb, pa);  in ext4_mb_release_group_pa()
5385 	BUG_ON(pa->pa_deleted == 0);  in ext4_mb_release_group_pa()
5386 	ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, &bit);  in ext4_mb_release_group_pa()
5387 	if (unlikely(group != e4b->bd_group && pa->pa_len != 0)) {  in ext4_mb_release_group_pa()
5389 			     e4b->bd_group, group, pa->pa_pstart);  in ext4_mb_release_group_pa()
5392 	mb_free_blocks(pa->pa_inode, e4b, bit, pa->pa_len);  in ext4_mb_release_group_pa()
5393 	atomic_add(pa->pa_len, &EXT4_SB(sb)->s_mb_discarded);  in ext4_mb_release_group_pa()
5394 	trace_ext4_mballoc_discard(sb, NULL, group, bit, pa->pa_len);  in ext4_mb_release_group_pa()
5414 	struct ext4_prealloc_space *pa, *tmp;  in ext4_mb_discard_group_preallocations()  local
5445 	list_for_each_entry_safe(pa, tmp,  in ext4_mb_discard_group_preallocations()
5447 		spin_lock(&pa->pa_lock);  in ext4_mb_discard_group_preallocations()
5448 		if (atomic_read(&pa->pa_count)) {  in ext4_mb_discard_group_preallocations()
5449 			spin_unlock(&pa->pa_lock);  in ext4_mb_discard_group_preallocations()
5453 		if (pa->pa_deleted) {  in ext4_mb_discard_group_preallocations()
5454 			spin_unlock(&pa->pa_lock);  in ext4_mb_discard_group_preallocations()
5459 		ext4_mb_mark_pa_deleted(sb, pa);  in ext4_mb_discard_group_preallocations()
5465 		free += pa->pa_free;  in ext4_mb_discard_group_preallocations()
5467 		spin_unlock(&pa->pa_lock);  in ext4_mb_discard_group_preallocations()
5469 		list_del(&pa->pa_group_list);  in ext4_mb_discard_group_preallocations()
5470 		list_add(&pa->u.pa_tmp_list, &list);  in ext4_mb_discard_group_preallocations()
5474 	list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) {  in ext4_mb_discard_group_preallocations()
5477 		if (pa->pa_type == MB_GROUP_PA) {  in ext4_mb_discard_group_preallocations()
5478 			spin_lock(pa->pa_node_lock.lg_lock);  in ext4_mb_discard_group_preallocations()
5479 			list_del_rcu(&pa->pa_node.lg_list);  in ext4_mb_discard_group_preallocations()
5480 			spin_unlock(pa->pa_node_lock.lg_lock);  in ext4_mb_discard_group_preallocations()
5482 			write_lock(pa->pa_node_lock.inode_lock);  in ext4_mb_discard_group_preallocations()
5483 			ei = EXT4_I(pa->pa_inode);  in ext4_mb_discard_group_preallocations()
5484 			rb_erase(&pa->pa_node.inode_node, &ei->i_prealloc_node);  in ext4_mb_discard_group_preallocations()
5485 			write_unlock(pa->pa_node_lock.inode_lock);  in ext4_mb_discard_group_preallocations()
5488 		list_del(&pa->u.pa_tmp_list);  in ext4_mb_discard_group_preallocations()
5490 		if (pa->pa_type == MB_GROUP_PA) {  in ext4_mb_discard_group_preallocations()
5491 			ext4_mb_release_group_pa(&e4b, pa);  in ext4_mb_discard_group_preallocations()
5492 			call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback);  in ext4_mb_discard_group_preallocations()
5494 			ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa);  in ext4_mb_discard_group_preallocations()
5495 			ext4_mb_pa_free(pa);  in ext4_mb_discard_group_preallocations()
5522 	struct ext4_prealloc_space *pa, *tmp;  in ext4_discard_preallocations()  local
5549 		pa = rb_entry(iter, struct ext4_prealloc_space,  in ext4_discard_preallocations()
5551 		BUG_ON(pa->pa_node_lock.inode_lock != &ei->i_prealloc_lock);  in ext4_discard_preallocations()
5553 		spin_lock(&pa->pa_lock);  in ext4_discard_preallocations()
5554 		if (atomic_read(&pa->pa_count)) {  in ext4_discard_preallocations()
5557 			spin_unlock(&pa->pa_lock);  in ext4_discard_preallocations()
5566 		if (pa->pa_deleted == 0) {  in ext4_discard_preallocations()
5567 			ext4_mb_mark_pa_deleted(sb, pa);  in ext4_discard_preallocations()
5568 			spin_unlock(&pa->pa_lock);  in ext4_discard_preallocations()
5569 			rb_erase(&pa->pa_node.inode_node, &ei->i_prealloc_node);  in ext4_discard_preallocations()
5570 			list_add(&pa->u.pa_tmp_list, &list);  in ext4_discard_preallocations()
5576 		spin_unlock(&pa->pa_lock);  in ext4_discard_preallocations()
5596 	list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) {  in ext4_discard_preallocations()
5597 		BUG_ON(pa->pa_type != MB_INODE_PA);  in ext4_discard_preallocations()
5598 		group = ext4_get_group_number(sb, pa->pa_pstart);  in ext4_discard_preallocations()
5618 		list_del(&pa->pa_group_list);  in ext4_discard_preallocations()
5619 		ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa);  in ext4_discard_preallocations()
5625 		list_del(&pa->u.pa_tmp_list);  in ext4_discard_preallocations()
5626 		ext4_mb_pa_free(pa);  in ext4_discard_preallocations()
5632 	struct ext4_prealloc_space *pa;  in ext4_mb_pa_alloc()  local
5635 	pa = kmem_cache_zalloc(ext4_pspace_cachep, GFP_NOFS);  in ext4_mb_pa_alloc()
5636 	if (!pa)  in ext4_mb_pa_alloc()
5638 	atomic_set(&pa->pa_count, 1);  in ext4_mb_pa_alloc()
5639 	ac->ac_pa = pa;  in ext4_mb_pa_alloc()
5645 	struct ext4_prealloc_space *pa = ac->ac_pa;  in ext4_mb_pa_put_free()  local
5647 	BUG_ON(!pa);  in ext4_mb_pa_put_free()
5649 	WARN_ON(!atomic_dec_and_test(&pa->pa_count));  in ext4_mb_pa_put_free()
5655 	pa->pa_deleted = 1;  in ext4_mb_pa_put_free()
5656 	ext4_mb_pa_free(pa);  in ext4_mb_pa_put_free()
5671 		struct ext4_prealloc_space *pa;  in ext4_mb_show_pa()  local
5679 			pa = list_entry(cur, struct ext4_prealloc_space,  in ext4_mb_show_pa()
5681 			spin_lock(&pa->pa_lock);  in ext4_mb_show_pa()
5682 			ext4_get_group_no_and_offset(sb, pa->pa_pstart,  in ext4_mb_show_pa()
5684 			spin_unlock(&pa->pa_lock);  in ext4_mb_show_pa()
5686 				 pa->pa_len);  in ext4_mb_show_pa()
5857 	struct ext4_prealloc_space *pa, *tmp;  in ext4_mb_discard_lg_preallocations()  local
5862 	list_for_each_entry_rcu(pa, &lg->lg_prealloc_list[order],  in ext4_mb_discard_lg_preallocations()
5865 		spin_lock(&pa->pa_lock);  in ext4_mb_discard_lg_preallocations()
5866 		if (atomic_read(&pa->pa_count)) {  in ext4_mb_discard_lg_preallocations()
5872 			spin_unlock(&pa->pa_lock);  in ext4_mb_discard_lg_preallocations()
5875 		if (pa->pa_deleted) {  in ext4_mb_discard_lg_preallocations()
5876 			spin_unlock(&pa->pa_lock);  in ext4_mb_discard_lg_preallocations()
5880 		BUG_ON(pa->pa_type != MB_GROUP_PA);  in ext4_mb_discard_lg_preallocations()
5883 		ext4_mb_mark_pa_deleted(sb, pa);  in ext4_mb_discard_lg_preallocations()
5884 		spin_unlock(&pa->pa_lock);  in ext4_mb_discard_lg_preallocations()
5886 		list_del_rcu(&pa->pa_node.lg_list);  in ext4_mb_discard_lg_preallocations()
5887 		list_add(&pa->u.pa_tmp_list, &discard_list);  in ext4_mb_discard_lg_preallocations()
5902 	list_for_each_entry_safe(pa, tmp, &discard_list, u.pa_tmp_list) {  in ext4_mb_discard_lg_preallocations()
5905 		group = ext4_get_group_number(sb, pa->pa_pstart);  in ext4_mb_discard_lg_preallocations()
5914 		list_del(&pa->pa_group_list);  in ext4_mb_discard_lg_preallocations()
5915 		ext4_mb_release_group_pa(&e4b, pa);  in ext4_mb_discard_lg_preallocations()
5919 		list_del(&pa->u.pa_tmp_list);  in ext4_mb_discard_lg_preallocations()
5920 		call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback);  in ext4_mb_discard_lg_preallocations()
5938 	struct ext4_prealloc_space *tmp_pa, *pa = ac->ac_pa;  in ext4_mb_add_n_trim()  local
5940 	order = fls(pa->pa_free) - 1;  in ext4_mb_add_n_trim()
5954 		if (!added && pa->pa_free < tmp_pa->pa_free) {  in ext4_mb_add_n_trim()
5956 			list_add_tail_rcu(&pa->pa_node.lg_list,  in ext4_mb_add_n_trim()
5968 		list_add_tail_rcu(&pa->pa_node.lg_list,  in ext4_mb_add_n_trim()
5984 	struct ext4_prealloc_space *pa = ac->ac_pa;  in ext4_mb_release_context()  local
5985 	if (pa) {  in ext4_mb_release_context()
5986 		if (pa->pa_type == MB_GROUP_PA) {  in ext4_mb_release_context()
5988 			spin_lock(&pa->pa_lock);  in ext4_mb_release_context()
5989 			pa->pa_pstart += EXT4_C2B(sbi, ac->ac_b_ex.fe_len);  in ext4_mb_release_context()
5990 			pa->pa_lstart += EXT4_C2B(sbi, ac->ac_b_ex.fe_len);  in ext4_mb_release_context()
5991 			pa->pa_free -= ac->ac_b_ex.fe_len;  in ext4_mb_release_context()
5992 			pa->pa_len -= ac->ac_b_ex.fe_len;  in ext4_mb_release_context()
5993 			spin_unlock(&pa->pa_lock);  in ext4_mb_release_context()
6001 			if (likely(pa->pa_free)) {  in ext4_mb_release_context()
6002 				spin_lock(pa->pa_node_lock.lg_lock);  in ext4_mb_release_context()
6003 				list_del_rcu(&pa->pa_node.lg_list);  in ext4_mb_release_context()
6004 				spin_unlock(pa->pa_node_lock.lg_lock);  in ext4_mb_release_context()
6009 		ext4_mb_put_pa(ac, ac->ac_sb, pa);  in ext4_mb_release_context()