diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index 8d87056..dc9c93e 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -656,7 +656,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 	BUG_ON(NULL == state);
 	selected_super = kzalloc(sizeof(*selected_super), GFP_NOFS);
 	if (NULL == selected_super) {
-		printk(KERN_INFO "btrfsic: error, kmalloc failed!\n");
+		pr_info("btrfsic: error, kmalloc failed!\n");
 		return -ENOMEM;
 	}
 
@@ -681,7 +681,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 	}
 
 	if (NULL == state->latest_superblock) {
-		printk(KERN_INFO "btrfsic: no superblock found!\n");
+		pr_info("btrfsic: no superblock found!\n");
 		kfree(selected_super);
 		return -1;
 	}
@@ -698,13 +698,13 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 			next_bytenr = btrfs_super_root(selected_super);
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_ROOT_CHUNK_LOG_TREE_LOCATION)
-				printk(KERN_INFO "root@%llu\n", next_bytenr);
+				pr_info("root@%llu\n", next_bytenr);
 			break;
 		case 1:
 			next_bytenr = btrfs_super_chunk_root(selected_super);
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_ROOT_CHUNK_LOG_TREE_LOCATION)
-				printk(KERN_INFO "chunk@%llu\n", next_bytenr);
+				pr_info("chunk@%llu\n", next_bytenr);
 			break;
 		case 2:
 			next_bytenr = btrfs_super_log_root(selected_super);
@@ -712,7 +712,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 				continue;
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_ROOT_CHUNK_LOG_TREE_LOCATION)
-				printk(KERN_INFO "log@%llu\n", next_bytenr);
+				pr_info("log@%llu\n", next_bytenr);
 			break;
 		}
 
@@ -720,7 +720,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 		    btrfs_num_copies(state->root->fs_info,
 				     next_bytenr, state->metablock_size);
 		if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
-			printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
+			pr_info("num_copies(log_bytenr=%llu) = %d\n",
 			       next_bytenr, num_copies);
 
 		for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) {
@@ -733,7 +733,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 						&tmp_next_block_ctx,
 						mirror_num);
 			if (ret) {
-				printk(KERN_INFO "btrfsic: btrfsic_map_block(root @%llu, mirror %d) failed!\n",
+				pr_info("btrfsic: btrfsic_map_block(root @%llu, mirror %d) failed!\n",
 				       next_bytenr, mirror_num);
 				kfree(selected_super);
 				return -1;
@@ -756,8 +756,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 
 			ret = btrfsic_read_block(state, &tmp_next_block_ctx);
 			if (ret < (int)PAGE_SIZE) {
-				printk(KERN_INFO
-				       "btrfsic: read @logical %llu failed!\n",
+				pr_info("btrfsic: read @logical %llu failed!\n",
 				       tmp_next_block_ctx.start);
 				btrfsic_release_block_ctx(&tmp_next_block_ctx);
 				kfree(selected_super);
@@ -818,7 +817,7 @@ static int btrfsic_process_superblock_dev_mirror(
 	if (NULL == superblock_tmp) {
 		superblock_tmp = btrfsic_block_alloc();
 		if (NULL == superblock_tmp) {
-			printk(KERN_INFO "btrfsic: error, kmalloc failed!\n");
+			pr_info("btrfsic: error, kmalloc failed!\n");
 			brelse(bh);
 			return -1;
 		}
@@ -892,7 +891,7 @@ static int btrfsic_process_superblock_dev_mirror(
 		    btrfs_num_copies(state->root->fs_info,
 				     next_bytenr, state->metablock_size);
 		if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
-			printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
+			pr_info("num_copies(log_bytenr=%llu) = %d\n",
 			       next_bytenr, num_copies);
 		for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) {
 			struct btrfsic_block *next_block;
@@ -903,7 +902,7 @@ static int btrfsic_process_superblock_dev_mirror(
 					      state->metablock_size,
 					      &tmp_next_block_ctx,
 					      mirror_num)) {
-				printk(KERN_INFO "btrfsic: btrfsic_map_block(bytenr @%llu, mirror %d) failed!\n",
+				pr_info("btrfsic: btrfsic_map_block(bytenr @%llu, mirror %d) failed!\n",
 				       next_bytenr, mirror_num);
 				brelse(bh);
 				return -1;
@@ -945,7 +944,7 @@ static struct btrfsic_stack_frame *btrfsic_stack_frame_alloc(void)
 
 	sf = kzalloc(sizeof(*sf), GFP_NOFS);
 	if (NULL == sf)
-		printk(KERN_INFO "btrfsic: alloc memory failed!\n");
+		pr_info("btrfsic: alloc memory failed!\n");
 	else
 		sf->magic = BTRFSIC_BLOCK_STACK_FRAME_MAGIC_NUMBER;
 	return sf;
@@ -991,8 +990,7 @@ continue_with_new_stack_frame:
 			sf->nr = btrfs_stack_header_nritems(&leafhdr->header);
 
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO
-				       "leaf %llu items %d generation %llu owner %llu\n",
+				pr_info("leaf %llu items %d generation %llu owner %llu\n",
 				       sf->block_ctx->start, sf->nr,
 				       btrfs_stack_header_generation(
 					       &leafhdr->header),
@@ -1019,8 +1017,7 @@ continue_with_current_leaf_stack_frame:
 			if (disk_item_offset + sizeof(struct btrfs_item) >
 			    sf->block_ctx->len) {
 leaf_item_out_of_bounce_error:
-				printk(KERN_INFO
-				       "btrfsic: leaf item out of bounce at logical %llu, dev %s\n",
+				pr_info("btrfsic: leaf item out of bounce at logical %llu, dev %s\n",
 				       sf->block_ctx->start,
 				       sf->block_ctx->dev->name);
 				goto one_stack_frame_backwards;
@@ -1116,7 +1113,7 @@ leaf_item_out_of_bounce_error:
 			sf->nr = btrfs_stack_header_nritems(&nodehdr->header);
 
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO "node %llu level %d items %d generation %llu owner %llu\n",
+				pr_info("node %llu level %d items %d generation %llu owner %llu\n",
 				       sf->block_ctx->start,
 				       nodehdr->header.level, sf->nr,
 				       btrfs_stack_header_generation(
@@ -1140,8 +1137,7 @@ continue_with_current_node_stack_frame:
 					  (uintptr_t)nodehdr;
 			if (key_ptr_offset + sizeof(struct btrfs_key_ptr) >
 			    sf->block_ctx->len) {
-				printk(KERN_INFO
-				       "btrfsic: node item out of bounce at logical %llu, dev %s\n",
+				pr_info("btrfsic: node item out of bounce at logical %llu, dev %s\n",
 				       sf->block_ctx->start,
 				       sf->block_ctx->dev->name);
 				goto one_stack_frame_backwards;
@@ -1270,7 +1266,7 @@ static int btrfsic_create_link_to_next_block(
 		    btrfs_num_copies(state->root->fs_info,
 				     next_bytenr, state->metablock_size);
 		if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
-			printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
+			pr_info("num_copies(log_bytenr=%llu) = %d\n",
 			       next_bytenr, *num_copiesp);
 		*mirror_nump = 1;
 	}
@@ -1279,15 +1275,13 @@ static int btrfsic_create_link_to_next_block(
 		return 0;
 
 	if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-		printk(KERN_INFO
-		       "btrfsic_create_link_to_next_block(mirror_num=%d)\n",
+		pr_info("btrfsic_create_link_to_next_block(mirror_num=%d)\n",
 		       *mirror_nump);
 	ret = btrfsic_map_block(state, next_bytenr,
 				state->metablock_size,
 				next_block_ctx, *mirror_nump);
 	if (ret) {
-		printk(KERN_INFO
-		       "btrfsic: btrfsic_map_block(@%llu, mirror=%d) failed!\n",
+		pr_info("btrfsic: btrfsic_map_block(@%llu, mirror=%d) failed!\n",
 		       next_bytenr, *mirror_nump);
 		btrfsic_release_block_ctx(next_block_ctx);
 		*next_blockp = NULL;
@@ -1313,16 +1307,14 @@ static int btrfsic_create_link_to_next_block(
 			if (next_block->logical_bytenr != next_bytenr &&
 			    !(!next_block->is_metadata &&
 			      0 == next_block->logical_bytenr))
-				printk(KERN_INFO
-				       "Referenced block @%llu (%s/%llu/%d) found in hash table, %c, bytenr mismatch (!= stored %llu).\n",
+				pr_info("Referenced block @%llu (%s/%llu/%d) found in hash table, %c, bytenr mismatch (!= stored %llu).\n",
 				       next_bytenr, next_block_ctx->dev->name,
 				       next_block_ctx->dev_bytenr, *mirror_nump,
 				       btrfsic_get_block_type(state,
 							      next_block),
 				       next_block->logical_bytenr);
 			else
-				printk(KERN_INFO
-				       "Referenced block @%llu (%s/%llu/%d) found in hash table, %c.\n",
+				pr_info("Referenced block @%llu (%s/%llu/%d) found in hash table, %c.\n",
 				       next_bytenr, next_block_ctx->dev->name,
 				       next_block_ctx->dev_bytenr, *mirror_nump,
 				       btrfsic_get_block_type(state,
@@ -1343,7 +1335,7 @@ static int btrfsic_create_link_to_next_block(
 	if (NULL == l) {
 		l = btrfsic_block_link_alloc();
 		if (NULL == l) {
-			printk(KERN_INFO "btrfsic: error, kmalloc failed!\n");
+			pr_info("btrfsic: error, kmalloc failed!\n");
 			btrfsic_release_block_ctx(next_block_ctx);
 			*next_blockp = NULL;
 			return -1;
@@ -1376,8 +1368,7 @@ static int btrfsic_create_link_to_next_block(
 	if (limit_nesting > 0 && did_alloc_block_link) {
 		ret = btrfsic_read_block(state, next_block_ctx);
 		if (ret < (int)next_block_ctx->len) {
-			printk(KERN_INFO
-			       "btrfsic: read block @logical %llu failed!\n",
+			pr_info("btrfsic: read block @logical %llu failed!\n",
 			       next_bytenr);
 			btrfsic_release_block_ctx(next_block_ctx);
 			*next_blockp = NULL;
@@ -1412,8 +1403,7 @@ static int btrfsic_handle_extent_data(
 	if (file_extent_item_offset +
 	    offsetof(struct btrfs_file_extent_item, disk_num_bytes) >
 	    block_ctx->len) {
-		printk(KERN_INFO
-		       "btrfsic: file item out of bounce at logical %llu, dev %s\n",
+		pr_info("btrfsic: file item out of bounce at logical %llu, dev %s\n",
 		       block_ctx->start, block_ctx->dev->name);
 		return -1;
 	}
@@ -1424,7 +1414,7 @@ static int btrfsic_handle_extent_data(
 	if (BTRFS_FILE_EXTENT_REG != file_extent_item.type ||
 	    btrfs_stack_file_extent_disk_bytenr(&file_extent_item) == 0) {
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERY_VERBOSE)
-			printk(KERN_INFO "extent_data: type %u, disk_bytenr = %llu\n",
+			pr_info("extent_data: type %u, disk_bytenr = %llu\n",
 			       file_extent_item.type,
 			       btrfs_stack_file_extent_disk_bytenr(
 			       &file_extent_item));
@@ -1433,8 +1423,7 @@ static int btrfsic_handle_extent_data(
 
 	if (file_extent_item_offset + sizeof(struct btrfs_file_extent_item) >
 	    block_ctx->len) {
-		printk(KERN_INFO
-		       "btrfsic: file item out of bounce at logical %llu, dev %s\n",
+		pr_info("btrfsic: file item out of bounce at logical %llu, dev %s\n",
 		       block_ctx->start, block_ctx->dev->name);
 		return -1;
 	}
@@ -1452,7 +1441,7 @@ static int btrfsic_handle_extent_data(
 	generation = btrfs_stack_file_extent_generation(&file_extent_item);
 
 	if (state->print_mask & BTRFSIC_PRINT_MASK_VERY_VERBOSE)
-		printk(KERN_INFO "extent_data: type %u, disk_bytenr = %llu, offset = %llu, num_bytes = %llu\n",
+		pr_info("extent_data: type %u, disk_bytenr = %llu, offset = %llu, num_bytes = %llu\n",
 		       file_extent_item.type,
 		       btrfs_stack_file_extent_disk_bytenr(&file_extent_item),
 		       btrfs_stack_file_extent_offset(&file_extent_item),
@@ -1471,7 +1460,7 @@ static int btrfsic_handle_extent_data(
 		    btrfs_num_copies(state->root->fs_info,
 				     next_bytenr, state->datablock_size);
 		if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
-			printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
+			pr_info("num_copies(log_bytenr=%llu) = %d\n",
 			       next_bytenr, num_copies);
 		for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) {
 			struct btrfsic_block_data_ctx next_block_ctx;
@@ -1479,17 +1468,16 @@ static int btrfsic_handle_extent_data(
 			int block_was_created;
 
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO "btrfsic_handle_extent_data(mirror_num=%d)\n", mirror_num);
+				pr_info("btrfsic_handle_extent_data(mirror_num=%d)\n",
+					mirror_num);
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERY_VERBOSE)
-				printk(KERN_INFO
-				       "\tdisk_bytenr = %llu, num_bytes %u\n",
+				pr_info("\tdisk_bytenr = %llu, num_bytes %u\n",
 				       next_bytenr, chunk_len);
 			ret = btrfsic_map_block(state, next_bytenr,
 						chunk_len, &next_block_ctx,
 						mirror_num);
 			if (ret) {
-				printk(KERN_INFO
-				       "btrfsic: btrfsic_map_block(@%llu, mirror=%d) failed!\n",
+				pr_info("btrfsic: btrfsic_map_block(@%llu, mirror=%d) failed!\n",
 				       next_bytenr, mirror_num);
 				return -1;
 			}
@@ -1504,8 +1492,7 @@ static int btrfsic_handle_extent_data(
 					mirror_num,
 					&block_was_created);
 			if (NULL == next_block) {
-				printk(KERN_INFO
-				       "btrfsic: error, kmalloc failed!\n");
+				pr_info("btrfsic: error, kmalloc failed!\n");
 				btrfsic_release_block_ctx(&next_block_ctx);
 				return -1;
 			}
@@ -1515,8 +1502,7 @@ static int btrfsic_handle_extent_data(
 				    next_block->logical_bytenr != next_bytenr &&
 				    !(!next_block->is_metadata &&
 				      0 == next_block->logical_bytenr)) {
-					printk(KERN_INFO
-					       "Referenced block @%llu (%s/%llu/%d) found in hash table, D, bytenr mismatch (!= stored %llu).\n",
+					pr_info("Referenced block @%llu (%s/%llu/%d) found in hash table, D, bytenr mismatch (!= stored %llu).\n",
 					       next_bytenr,
 					       next_block_ctx.dev->name,
 					       next_block_ctx.dev_bytenr,
@@ -1580,7 +1566,7 @@ static int btrfsic_map_block(struct btrfsic_state *state, u64 bytenr, u32 len,
 	kfree(multi);
 	if (NULL == block_ctx_out->dev) {
 		ret = -ENXIO;
-		printk(KERN_INFO "btrfsic: error, cannot lookup dev (#1)!\n");
+		pr_info("btrfsic: error, cannot lookup dev (#1)!\n");
 	}
 
 	return ret;
@@ -1626,8 +1612,7 @@ static int btrfsic_read_block(struct btrfsic_state *state,
 	BUG_ON(block_ctx->pagev);
 	BUG_ON(block_ctx->mem_to_free);
 	if (block_ctx->dev_bytenr & ((u64)PAGE_SIZE - 1)) {
-		printk(KERN_INFO
-		       "btrfsic: read_block() with unaligned bytenr %llu\n",
+		pr_info("btrfsic: read_block() with unaligned bytenr %llu\n",
 		       block_ctx->dev_bytenr);
 		return -1;
 	}
@@ -1654,8 +1639,7 @@ static int btrfsic_read_block(struct btrfsic_state *state,
 
 		bio = btrfs_io_bio_alloc(GFP_NOFS, num_pages - i);
 		if (!bio) {
-			printk(KERN_INFO
-			       "btrfsic: bio_alloc() for %u pages failed!\n",
+			pr_info("btrfsic: bio_alloc() for %u pages failed!\n",
 			       num_pages - i);
 			return -1;
 		}
@@ -1670,13 +1654,11 @@ static int btrfsic_read_block(struct btrfsic_state *state,
 				break;
 		}
 		if (j == i) {
-			printk(KERN_INFO
-			       "btrfsic: error, failed to add a single page!\n");
+			pr_info("btrfsic: error, failed to add a single page!\n");
 			return -1;
 		}
 		if (submit_bio_wait(bio)) {
-			printk(KERN_INFO
-			       "btrfsic: read error at logical %llu dev %s!\n",
+			pr_info("btrfsic: read error at logical %llu dev %s!\n",
 			       block_ctx->start, block_ctx->dev->name);
 			bio_put(bio);
 			return -1;
@@ -1688,7 +1670,7 @@ static int btrfsic_read_block(struct btrfsic_state *state,
 	for (i = 0; i < num_pages; i++) {
 		block_ctx->datav[i] = kmap(block_ctx->pagev[i]);
 		if (!block_ctx->datav[i]) {
-			printk(KERN_INFO "btrfsic: kmap() failed (dev %s)!\n",
+			pr_info("btrfsic: kmap() failed (dev %s)!\n",
 			       block_ctx->dev->name);
 			return -1;
 		}
@@ -1703,17 +1685,17 @@ static void btrfsic_dump_database(struct btrfsic_state *state)
 
 	BUG_ON(NULL == state);
 
-	printk(KERN_INFO "all_blocks_list:\n");
+	pr_info("all_blocks_list:\n");
 	list_for_each_entry(b_all, &state->all_blocks_list, all_blocks_node) {
 		const struct btrfsic_block_link *l;
 
-		printk(KERN_INFO "%c-block @%llu (%s/%llu/%d)\n",
+		pr_info("%c-block @%llu (%s/%llu/%d)\n",
 		       btrfsic_get_block_type(state, b_all),
 		       b_all->logical_bytenr, b_all->dev_state->name,
 		       b_all->dev_bytenr, b_all->mirror_num);
 
 		list_for_each_entry(l, &b_all->ref_to_list, node_ref_to) {
-			printk(KERN_INFO " %c @%llu (%s/%llu/%d) refers %u* to %c @%llu (%s/%llu/%d)\n",
+			pr_info(" %c @%llu (%s/%llu/%d) refers %u* to %c @%llu (%s/%llu/%d)\n",
 			       btrfsic_get_block_type(state, b_all),
 			       b_all->logical_bytenr, b_all->dev_state->name,
 			       b_all->dev_bytenr, b_all->mirror_num,
@@ -1726,7 +1708,7 @@ static void btrfsic_dump_database(struct btrfsic_state *state)
 		}
 
 		list_for_each_entry(l, &b_all->ref_from_list, node_ref_from) {
-			printk(KERN_INFO " %c @%llu (%s/%llu/%d) is ref %u* from %c @%llu (%s/%llu/%d)\n",
+			pr_info(" %c @%llu (%s/%llu/%d) is ref %u* from %c @%llu (%s/%llu/%d)\n",
 			       btrfsic_get_block_type(state, b_all),
 			       b_all->logical_bytenr, b_all->dev_state->name,
 			       b_all->dev_bytenr, b_all->mirror_num,
@@ -1738,7 +1720,7 @@ static void btrfsic_dump_database(struct btrfsic_state *state)
 			       l->block_ref_from->mirror_num);
 		}
 
-		printk(KERN_INFO "\n");
+		pr_info("\n");
 	}
 }
 
@@ -1813,8 +1795,7 @@ again:
 						    mapped_datav[0]);
 			if (num_pages * PAGE_SIZE <
 			    BTRFS_SUPER_INFO_SIZE) {
-				printk(KERN_INFO
-				       "btrfsic: cannot work with too short bios!\n");
+				pr_info("btrfsic: cannot work with too short bios!\n");
 				return;
 			}
 			is_metadata = 1;
@@ -1822,8 +1803,7 @@ again:
 			processed_len = BTRFS_SUPER_INFO_SIZE;
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_TREE_BEFORE_SB_WRITE) {
-				printk(KERN_INFO
-				       "[before new superblock is written]:\n");
+				pr_info("[before new superblock is written]:\n");
 				btrfsic_dump_tree_sub(state, block, 0);
 			}
 		}
@@ -1831,8 +1811,7 @@ again:
 			if (!block->is_superblock) {
 				if (num_pages * PAGE_SIZE <
 				    state->metablock_size) {
-					printk(KERN_INFO
-					       "btrfsic: cannot work with too short bios!\n");
+					pr_info("btrfsic: cannot work with too short bios!\n");
 					return;
 				}
 				processed_len = state->metablock_size;
@@ -1847,8 +1826,7 @@ again:
 				if (block->logical_bytenr != bytenr &&
 				    !(!block->is_metadata &&
 				      block->logical_bytenr == 0))
-					printk(KERN_INFO
-					       "Written block @%llu (%s/%llu/%d) found in hash table, %c, bytenr mismatch (!= stored %llu).\n",
+					pr_info("Written block @%llu (%s/%llu/%d) found in hash table, %c, bytenr mismatch (!= stored %llu).\n",
 					       bytenr, dev_state->name,
 					       dev_bytenr,
 					       block->mirror_num,
@@ -1856,8 +1834,7 @@ again:
 								      block),
 					       block->logical_bytenr);
 				else
-					printk(KERN_INFO
-					       "Written block @%llu (%s/%llu/%d) found in hash table, %c.\n",
+					pr_info("Written block @%llu (%s/%llu/%d) found in hash table, %c.\n",
 					       bytenr, dev_state->name,
 					       dev_bytenr, block->mirror_num,
 					       btrfsic_get_block_type(state,
@@ -1867,27 +1844,24 @@ again:
 		} else {
 			if (num_pages * PAGE_SIZE <
 			    state->datablock_size) {
-				printk(KERN_INFO
-				       "btrfsic: cannot work with too short bios!\n");
+				pr_info("btrfsic: cannot work with too short bios!\n");
 				return;
 			}
 			processed_len = state->datablock_size;
 			bytenr = block->logical_bytenr;
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO
-				       "Written block @%llu (%s/%llu/%d) found in hash table, %c.\n",
+				pr_info("Written block @%llu (%s/%llu/%d) found in hash table, %c.\n",
 				       bytenr, dev_state->name, dev_bytenr,
 				       block->mirror_num,
 				       btrfsic_get_block_type(state, block));
 		}
 
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "ref_to_list: %cE, ref_from_list: %cE\n",
+			pr_info("ref_to_list: %cE, ref_from_list: %cE\n",
 			       list_empty(&block->ref_to_list) ? ' ' : '!',
 			       list_empty(&block->ref_from_list) ? ' ' : '!');
 		if (btrfsic_is_block_ref_by_superblock(state, block, 0)) {
-			printk(KERN_INFO "btrfs: attempt to overwrite %c-block @%llu (%s/%llu/%d), old(gen=%llu, objectid=%llu, type=%d, offset=%llu), new(gen=%llu), which is referenced by most recent superblock (superblockgen=%llu)!\n",
+			pr_info("btrfs: attempt to overwrite %c-block @%llu (%s/%llu/%d), old(gen=%llu, objectid=%llu, type=%d, offset=%llu), new(gen=%llu), which is referenced by most recent superblock (superblockgen=%llu)!\n",
 			       btrfsic_get_block_type(state, block), bytenr,
 			       dev_state->name, dev_bytenr, block->mirror_num,
 			       block->generation,
@@ -1901,7 +1875,7 @@ again:
 		}
 
 		if (!block->is_iodone && !block->never_written) {
-			printk(KERN_INFO "btrfs: attempt to overwrite %c-block @%llu (%s/%llu/%d), oldgen=%llu, newgen=%llu, which is not yet iodone!\n",
+			pr_info("btrfs: attempt to overwrite %c-block @%llu (%s/%llu/%d), oldgen=%llu, newgen=%llu, which is not yet iodone!\n",
 			       btrfsic_get_block_type(state, block), bytenr,
 			       dev_state->name, dev_bytenr, block->mirror_num,
 			       block->generation,
@@ -1999,8 +1973,7 @@ again:
 						mapped_datav[0]);
 				if (state->print_mask &
 				    BTRFSIC_PRINT_MASK_TREE_AFTER_SB_WRITE) {
-					printk(KERN_INFO
-					"[after new superblock is written]:\n");
+					pr_info("[after new superblock is written]:\n");
 					btrfsic_dump_tree_sub(state, block, 0);
 				}
 			} else {
@@ -2012,8 +1985,7 @@ again:
 						0, 0);
 			}
 			if (ret)
-				printk(KERN_INFO
-				       "btrfsic: btrfsic_process_metablock(root @%llu) failed!\n",
+				pr_info("btrfsic: btrfsic_process_metablock(root @%llu) failed!\n",
 				       dev_bytenr);
 		} else {
 			block->is_metadata = 0;
@@ -2040,7 +2012,7 @@ again:
 		if (!is_metadata) {
 			processed_len = state->datablock_size;
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO "Written block (%s/%llu/?) !found in hash table, D.\n",
+				pr_info("Written block (%s/%llu/?) !found in hash table, D.\n",
 				       dev_state->name, dev_bytenr);
 			if (!state->include_extent_data) {
 				/* ignore that written D block */
@@ -2058,8 +2030,7 @@ again:
 			btrfsic_cmp_log_and_dev_bytenr(state, bytenr, dev_state,
 						       dev_bytenr);
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO
-				       "Written block @%llu (%s/%llu/?) !found in hash table, M.\n",
+				pr_info("Written block @%llu (%s/%llu/?) !found in hash table, M.\n",
 				       bytenr, dev_state->name, dev_bytenr);
 		}
 
@@ -2073,7 +2044,7 @@ again:
 
 		block = btrfsic_block_alloc();
 		if (NULL == block) {
-			printk(KERN_INFO "btrfsic: error, kmalloc failed!\n");
+			pr_info("btrfsic: error, kmalloc failed!\n");
 			btrfsic_release_block_ctx(&block_ctx);
 			goto continue_loop;
 		}
@@ -2123,8 +2094,7 @@ again:
 			block->next_in_same_bio = NULL;
 		}
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "New written %c-block @%llu (%s/%llu/%d)\n",
+			pr_info("New written %c-block @%llu (%s/%llu/%d)\n",
 			       is_metadata ? 'M' : 'D',
 			       block->logical_bytenr, block->dev_state->name,
 			       block->dev_bytenr, block->mirror_num);
@@ -2135,8 +2105,7 @@ again:
 			ret = btrfsic_process_metablock(state, block,
 							&block_ctx, 0, 0);
 			if (ret)
-				printk(KERN_INFO
-				       "btrfsic: process_metablock(root @%llu) failed!\n",
+				pr_info("btrfsic: process_metablock(root @%llu) failed!\n",
 				       dev_bytenr);
 		}
 		btrfsic_release_block_ctx(&block_ctx);
@@ -2171,8 +2140,7 @@ static void btrfsic_bio_end_io(struct bio *bp)
 
 		if ((dev_state->state->print_mask &
 		     BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
-			printk(KERN_INFO
-			       "bio_end_io(err=%d) for %c @%llu (%s/%llu/%d)\n",
+			pr_info("bio_end_io(err=%d) for %c @%llu (%s/%llu/%d)\n",
 			       bp->bi_error,
 			       btrfsic_get_block_type(dev_state->state, block),
 			       block->logical_bytenr, dev_state->name,
@@ -2183,8 +2151,7 @@ static void btrfsic_bio_end_io(struct bio *bp)
 			dev_state->last_flush_gen++;
 			if ((dev_state->state->print_mask &
 			     BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
-				printk(KERN_INFO
-				       "bio_end_io() new %s flush_gen=%llu\n",
+				pr_info("bio_end_io() new %s flush_gen=%llu\n",
 				       dev_state->name,
 				       dev_state->last_flush_gen);
 		}
@@ -2207,8 +2174,7 @@ static void btrfsic_bh_end_io(struct buffer_head *bh, int uptodate)
 	BUG_ON(NULL == block);
 	dev_state = block->dev_state;
 	if ((dev_state->state->print_mask & BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
-		printk(KERN_INFO
-		       "bh_end_io(error=%d) for %c @%llu (%s/%llu/%d)\n",
+		pr_info("bh_end_io(error=%d) for %c @%llu (%s/%llu/%d)\n",
 		       iodone_w_error,
 		       btrfsic_get_block_type(dev_state->state, block),
 		       block->logical_bytenr, block->dev_state->name,
@@ -2219,8 +2185,7 @@ static void btrfsic_bh_end_io(struct buffer_head *bh, int uptodate)
 		dev_state->last_flush_gen++;
 		if ((dev_state->state->print_mask &
 		     BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
-			printk(KERN_INFO
-			       "bh_end_io() new %s flush_gen=%llu\n",
+			pr_info("bh_end_io() new %s flush_gen=%llu\n",
 			       dev_state->name, dev_state->last_flush_gen);
 	}
 	if (block->submit_bio_bh_rw & REQ_FUA)
@@ -2243,8 +2208,7 @@ static int btrfsic_process_written_superblock(
 	if (!(superblock->generation > state->max_superblock_generation ||
 	      0 == state->max_superblock_generation)) {
 		if (state->print_mask & BTRFSIC_PRINT_MASK_SUPERBLOCK_WRITE)
-			printk(KERN_INFO
-			       "btrfsic: superblock @%llu (%s/%llu/%d) with old gen %llu <= %llu\n",
+			pr_info("btrfsic: superblock @%llu (%s/%llu/%d) with old gen %llu <= %llu\n",
 			       superblock->logical_bytenr,
 			       superblock->dev_state->name,
 			       superblock->dev_bytenr, superblock->mirror_num,
@@ -2252,8 +2216,7 @@ static int btrfsic_process_written_superblock(
 			       state->max_superblock_generation);
 	} else {
 		if (state->print_mask & BTRFSIC_PRINT_MASK_SUPERBLOCK_WRITE)
-			printk(KERN_INFO
-			       "btrfsic: got new superblock @%llu (%s/%llu/%d) with new gen %llu > %llu\n",
+			pr_info("btrfsic: got new superblock @%llu (%s/%llu/%d) with new gen %llu > %llu\n",
 			       superblock->logical_bytenr,
 			       superblock->dev_state->name,
 			       superblock->dev_bytenr, superblock->mirror_num,
@@ -2288,7 +2251,7 @@ static int btrfsic_process_written_superblock(
 			next_bytenr = btrfs_super_root(super_hdr);
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_ROOT_CHUNK_LOG_TREE_LOCATION)
-				printk(KERN_INFO "root@%llu\n", next_bytenr);
+				pr_info("root@%llu\n", next_bytenr);
 			break;
 		case 1:
 			btrfs_set_disk_key_objectid(&tmp_disk_key,
@@ -2297,7 +2260,7 @@ static int btrfsic_process_written_superblock(
 			next_bytenr = btrfs_super_chunk_root(super_hdr);
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_ROOT_CHUNK_LOG_TREE_LOCATION)
-				printk(KERN_INFO "chunk@%llu\n", next_bytenr);
+				pr_info("chunk@%llu\n", next_bytenr);
 			break;
 		case 2:
 			btrfs_set_disk_key_objectid(&tmp_disk_key,
@@ -2308,7 +2271,7 @@ static int btrfsic_process_written_superblock(
 				continue;
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_ROOT_CHUNK_LOG_TREE_LOCATION)
-				printk(KERN_INFO "log@%llu\n", next_bytenr);
+				pr_info("log@%llu\n", next_bytenr);
 			break;
 		}
 
@@ -2316,21 +2279,19 @@ static int btrfsic_process_written_superblock(
 		    btrfs_num_copies(state->root->fs_info,
 				     next_bytenr, BTRFS_SUPER_INFO_SIZE);
 		if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
-			printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
+			pr_info("num_copies(log_bytenr=%llu) = %d\n",
 			       next_bytenr, num_copies);
 		for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) {
 			int was_created;
 
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO
-				       "btrfsic_process_written_superblock(mirror_num=%d)\n", mirror_num);
+				pr_info("btrfsic_process_written_superblock(mirror_num=%d)\n", mirror_num);
 			ret = btrfsic_map_block(state, next_bytenr,
 						BTRFS_SUPER_INFO_SIZE,
 						&tmp_next_block_ctx,
 						mirror_num);
 			if (ret) {
-				printk(KERN_INFO
-				       "btrfsic: btrfsic_map_block(@%llu, mirror=%d) failed!\n",
+				pr_info("btrfsic: btrfsic_map_block(@%llu, mirror=%d) failed!\n",
 				       next_bytenr, mirror_num);
 				return -1;
 			}
@@ -2343,8 +2304,7 @@ static int btrfsic_process_written_superblock(
 					mirror_num,
 					&was_created);
 			if (NULL == next_block) {
-				printk(KERN_INFO
-				       "btrfsic: error, kmalloc failed!\n");
+				pr_info("btrfsic: error, kmalloc failed!\n");
 				btrfsic_release_block_ctx(&tmp_next_block_ctx);
 				return -1;
 			}
@@ -2393,8 +2353,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 		 * by the most recent super block.
 		 */
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "btrfsic: abort cyclic linkage (case 1).\n");
+			pr_info("btrfsic: abort cyclic linkage (case 1).\n");
 
 		return ret;
 	}
@@ -2405,8 +2364,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 	 */
 	list_for_each_entry(l, &block->ref_to_list, node_ref_to) {
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "rl=%d, %c @%llu (%s/%llu/%d) %u* refers to %c @%llu (%s/%llu/%d)\n",
+			pr_info("rl=%d, %c @%llu (%s/%llu/%d) %u* refers to %c @%llu (%s/%llu/%d)\n",
 			       recursion_level,
 			       btrfsic_get_block_type(state, block),
 			       block->logical_bytenr, block->dev_state->name,
@@ -2418,7 +2376,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 			       l->block_ref_to->dev_bytenr,
 			       l->block_ref_to->mirror_num);
 		if (l->block_ref_to->never_written) {
-			printk(KERN_INFO "btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) which is never written!\n",
+			pr_info("btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) which is never written!\n",
 			       btrfsic_get_block_type(state, l->block_ref_to),
 			       l->block_ref_to->logical_bytenr,
 			       l->block_ref_to->dev_state->name,
@@ -2426,7 +2384,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 			       l->block_ref_to->mirror_num);
 			ret = -1;
 		} else if (!l->block_ref_to->is_iodone) {
-			printk(KERN_INFO "btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) which is not yet iodone!\n",
+			pr_info("btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) which is not yet iodone!\n",
 			       btrfsic_get_block_type(state, l->block_ref_to),
 			       l->block_ref_to->logical_bytenr,
 			       l->block_ref_to->dev_state->name,
@@ -2434,7 +2392,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 			       l->block_ref_to->mirror_num);
 			ret = -1;
 		} else if (l->block_ref_to->iodone_w_error) {
-			printk(KERN_INFO "btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) which has write error!\n",
+			pr_info("btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) which has write error!\n",
 			       btrfsic_get_block_type(state, l->block_ref_to),
 			       l->block_ref_to->logical_bytenr,
 			       l->block_ref_to->dev_state->name,
@@ -2447,7 +2405,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 			   l->parent_generation &&
 			   BTRFSIC_GENERATION_UNKNOWN !=
 			   l->block_ref_to->generation) {
-			printk(KERN_INFO "btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) with generation %llu != parent generation %llu!\n",
+			pr_info("btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) with generation %llu != parent generation %llu!\n",
 			       btrfsic_get_block_type(state, l->block_ref_to),
 			       l->block_ref_to->logical_bytenr,
 			       l->block_ref_to->dev_state->name,
@@ -2458,7 +2416,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 			ret = -1;
 		} else if (l->block_ref_to->flush_gen >
 			   l->block_ref_to->dev_state->last_flush_gen) {
-			printk(KERN_INFO "btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) which is not flushed out of disk's write cache (block flush_gen=%llu, dev->flush_gen=%llu)!\n",
+			pr_info("btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) which is not flushed out of disk's write cache (block flush_gen=%llu, dev->flush_gen=%llu)!\n",
 			       btrfsic_get_block_type(state, l->block_ref_to),
 			       l->block_ref_to->logical_bytenr,
 			       l->block_ref_to->dev_state->name,
@@ -2487,8 +2445,7 @@ static int btrfsic_is_block_ref_by_superblock(
 	if (recursion_level >= 3 + BTRFS_MAX_LEVEL) {
 		/* refer to comment at "abort cyclic linkage (case 1)" */
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "btrfsic: abort cyclic linkage (case 2).\n");
+			pr_info("btrfsic: abort cyclic linkage (case 2).\n");
 
 		return 0;
 	}
@@ -2499,8 +2456,7 @@ static int btrfsic_is_block_ref_by_superblock(
 	 */
 	list_for_each_entry(l, &block->ref_from_list, node_ref_from) {
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "rl=%d, %c @%llu (%s/%llu/%d) is ref %u* from %c @%llu (%s/%llu/%d)\n",
+			pr_info("rl=%d, %c @%llu (%s/%llu/%d) is ref %u* from %c @%llu (%s/%llu/%d)\n",
 			       recursion_level,
 			       btrfsic_get_block_type(state, block),
 			       block->logical_bytenr, block->dev_state->name,
@@ -2530,8 +2486,7 @@ static int btrfsic_is_block_ref_by_superblock(
 static void btrfsic_print_add_link(const struct btrfsic_state *state,
 				   const struct btrfsic_block_link *l)
 {
-	printk(KERN_INFO
-	       "Add %u* link from %c @%llu (%s/%llu/%d) to %c @%llu (%s/%llu/%d).\n",
+	pr_info("Add %u* link from %c @%llu (%s/%llu/%d) to %c @%llu (%s/%llu/%d).\n",
 	       l->ref_cnt,
 	       btrfsic_get_block_type(state, l->block_ref_from),
 	       l->block_ref_from->logical_bytenr,
@@ -2546,8 +2501,7 @@ static void btrfsic_print_add_link(const struct btrfsic_state *state,
 static void btrfsic_print_rem_link(const struct btrfsic_state *state,
 				   const struct btrfsic_block_link *l)
 {
-	printk(KERN_INFO
-	       "Rem %u* link from %c @%llu (%s/%llu/%d) to %c @%llu (%s/%llu/%d).\n",
+	pr_info("Rem %u* link from %c @%llu (%s/%llu/%d) to %c @%llu (%s/%llu/%d).\n",
 	       l->ref_cnt,
 	       btrfsic_get_block_type(state, l->block_ref_from),
 	       l->block_ref_from->logical_bytenr,
@@ -2659,8 +2613,7 @@ static struct btrfsic_block_link *btrfsic_block_link_lookup_or_add(
 	if (NULL == l) {
 		l = btrfsic_block_link_alloc();
 		if (NULL == l) {
-			printk(KERN_INFO
-			       "btrfsic: error, kmalloc failed!\n");
+			pr_info("btrfsic: error, kmalloc failed!\n");
 			return NULL;
 		}
 
@@ -2707,13 +2660,12 @@ static struct btrfsic_block *btrfsic_block_lookup_or_add(
 
 		block = btrfsic_block_alloc();
 		if (NULL == block) {
-			printk(KERN_INFO "btrfsic: error, kmalloc failed!\n");
+			pr_info("btrfsic: error, kmalloc failed!\n");
 			return NULL;
 		}
 		dev_state = btrfsic_dev_state_lookup(block_ctx->dev->bdev);
 		if (NULL == dev_state) {
-			printk(KERN_INFO
-			       "btrfsic: error, lookup dev_state failed!\n");
+			pr_info("btrfsic: error, lookup dev_state failed!\n");
 			btrfsic_block_free(block);
 			return NULL;
 		}
@@ -2725,8 +2677,7 @@ static struct btrfsic_block *btrfsic_block_lookup_or_add(
 		block->never_written = never_written;
 		block->mirror_num = mirror_num;
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "New %s%c-block @%llu (%s/%llu/%d)\n",
+			pr_info("New %s%c-block @%llu (%s/%llu/%d)\n",
 			       additional_string,
 			       btrfsic_get_block_type(state, block),
 			       block->logical_bytenr, dev_state->name,
@@ -2761,7 +2712,7 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
 		ret = btrfsic_map_block(state, bytenr, state->metablock_size,
 					&block_ctx, mirror_num);
 		if (ret) {
-			printk(KERN_INFO "btrfsic: btrfsic_map_block(logical @%llu, mirror %d) failed!\n",
+			pr_info("btrfsic: btrfsic_map_block(logical @%llu, mirror %d) failed!\n",
 			       bytenr, mirror_num);
 			continue;
 		}
@@ -2776,7 +2727,7 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
 	}
 
 	if (WARN_ON(!match)) {
-		printk(KERN_INFO "btrfs: attempt to write M-block which contains logical bytenr that doesn't map to dev+physical bytenr of submit_bio, buffer->log_bytenr=%llu, submit_bio(bdev=%s, phys_bytenr=%llu)!\n",
+		pr_info("btrfs: attempt to write M-block which contains logical bytenr that doesn't map to dev+physical bytenr of submit_bio, buffer->log_bytenr=%llu, submit_bio(bdev=%s, phys_bytenr=%llu)!\n",
 		       bytenr, dev_state->name, dev_bytenr);
 		for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) {
 			ret = btrfsic_map_block(state, bytenr,
@@ -2785,7 +2736,7 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
 			if (ret)
 				continue;
 
-			printk(KERN_INFO "Read logical bytenr @%llu maps to (%s/%llu/%d)\n",
+			pr_info("Read logical bytenr @%llu maps to (%s/%llu/%d)\n",
 			       bytenr, block_ctx.dev->name,
 			       block_ctx.dev_bytenr, mirror_num);
 		}
@@ -2822,8 +2773,7 @@ int btrfsic_submit_bh(int op, int op_flags, struct buffer_head *bh)
 		dev_bytenr = 4096 * bh->b_blocknr;
 		if (dev_state->state->print_mask &
 		    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
-			printk(KERN_INFO
-			       "submit_bh(op=0x%x,0x%x, blocknr=%llu (bytenr %llu), size=%zu, data=%p, bdev=%p)\n",
+			pr_info("submit_bh(op=0x%x,0x%x, blocknr=%llu (bytenr %llu), size=%zu, data=%p, bdev=%p)\n",
 			       op, op_flags, (unsigned long long)bh->b_blocknr,
 			       dev_bytenr, bh->b_size, bh->b_data, bh->b_bdev);
 		btrfsic_process_written_block(dev_state, dev_bytenr,
@@ -2832,15 +2782,13 @@ int btrfsic_submit_bh(int op, int op_flags, struct buffer_head *bh)
 	} else if (NULL != dev_state && (op_flags & REQ_PREFLUSH)) {
 		if (dev_state->state->print_mask &
 		    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
-			printk(KERN_INFO
-			       "submit_bh(op=0x%x,0x%x FLUSH, bdev=%p)\n",
+			pr_info("submit_bh(op=0x%x,0x%x FLUSH, bdev=%p)\n",
 			       op, op_flags, bh->b_bdev);
 		if (!dev_state->dummy_block_for_bio_bh_flush.is_iodone) {
 			if ((dev_state->state->print_mask &
 			     (BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH |
 			      BTRFSIC_PRINT_MASK_VERBOSE)))
-				printk(KERN_INFO
-				       "btrfsic_submit_bh(%s) with FLUSH but dummy block already in use (ignored)!\n",
+				pr_info("btrfsic_submit_bh(%s) with FLUSH but dummy block already in use (ignored)!\n",
 				       dev_state->name);
 		} else {
 			struct btrfsic_block *const block =
@@ -2885,8 +2833,7 @@ static void __btrfsic_submit_bio(struct bio *bio)
 		bio_is_patched = 0;
 		if (dev_state->state->print_mask &
 		    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
-			printk(KERN_INFO
-			       "submit_bio(rw=%d,0x%x, bi_vcnt=%u, bi_sector=%llu (bytenr %llu), bi_bdev=%p)\n",
+			pr_info("submit_bio(rw=%d,0x%x, bi_vcnt=%u, bi_sector=%llu (bytenr %llu), bi_bdev=%p)\n",
 			       bio_op(bio), bio->bi_opf, bio->bi_vcnt,
 			       (unsigned long long)bio->bi_iter.bi_sector,
 			       dev_bytenr, bio->bi_bdev);
@@ -2909,8 +2856,7 @@ static void __btrfsic_submit_bio(struct bio *bio)
 			}
 			if (dev_state->state->print_mask &
 			    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH_VERBOSE)
-				printk(KERN_INFO
-				       "#%u: bytenr=%llu, len=%u, offset=%u\n",
+				pr_info("#%u: bytenr=%llu, len=%u, offset=%u\n",
 				       i, cur_bytenr, bio->bi_io_vec[i].bv_len,
 				       bio->bi_io_vec[i].bv_offset);
 			cur_bytenr += bio->bi_io_vec[i].bv_len;
@@ -2927,15 +2873,13 @@ static void __btrfsic_submit_bio(struct bio *bio)
 	} else if (NULL != dev_state && (bio->bi_opf & REQ_PREFLUSH)) {
 		if (dev_state->state->print_mask &
 		    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
-			printk(KERN_INFO
-			       "submit_bio(rw=%d,0x%x FLUSH, bdev=%p)\n",
+			pr_info("submit_bio(rw=%d,0x%x FLUSH, bdev=%p)\n",
 			       bio_op(bio), bio->bi_opf, bio->bi_bdev);
 		if (!dev_state->dummy_block_for_bio_bh_flush.is_iodone) {
 			if ((dev_state->state->print_mask &
 			     (BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH |
 			      BTRFSIC_PRINT_MASK_VERBOSE)))
-				printk(KERN_INFO
-				       "btrfsic_submit_bio(%s) with FLUSH but dummy block already in use (ignored)!\n",
+				pr_info("btrfsic_submit_bio(%s) with FLUSH but dummy block already in use (ignored)!\n",
 				       dev_state->name);
 		} else {
 			struct btrfsic_block *const block =
@@ -2979,14 +2923,12 @@ int btrfsic_mount(struct btrfs_root *root,
 	struct btrfs_device *device;
 
 	if (root->nodesize & ((u64)PAGE_SIZE - 1)) {
-		printk(KERN_INFO
-		       "btrfsic: cannot handle nodesize %d not being a multiple of PAGE_SIZE %ld!\n",
+		pr_info("btrfsic: cannot handle nodesize %d not being a multiple of PAGE_SIZE %ld!\n",
 		       root->nodesize, PAGE_SIZE);
 		return -1;
 	}
 	if (root->sectorsize & ((u64)PAGE_SIZE - 1)) {
-		printk(KERN_INFO
-		       "btrfsic: cannot handle sectorsize %d not being a multiple of PAGE_SIZE %ld!\n",
+		pr_info("btrfsic: cannot handle sectorsize %d not being a multiple of PAGE_SIZE %ld!\n",
 		       root->sectorsize, PAGE_SIZE);
 		return -1;
 	}
@@ -2994,7 +2936,7 @@ int btrfsic_mount(struct btrfs_root *root,
 	if (!state) {
 		state = vzalloc(sizeof(*state));
 		if (!state) {
-			printk(KERN_INFO "btrfs check-integrity: vzalloc() failed!\n");
+			pr_info("btrfs check-integrity: vzalloc() failed!\n");
 			return -1;
 		}
 	}
@@ -3026,8 +2968,7 @@ int btrfsic_mount(struct btrfs_root *root,
 
 		ds = btrfsic_dev_state_alloc();
 		if (NULL == ds) {
-			printk(KERN_INFO
-			       "btrfs check-integrity: kmalloc() failed!\n");
+			pr_info("btrfs check-integrity: kmalloc() failed!\n");
 			mutex_unlock(&btrfsic_mutex);
 			return -1;
 		}
@@ -3088,8 +3029,7 @@ void btrfsic_unmount(struct btrfs_root *root,
 	}
 
 	if (NULL == state) {
-		printk(KERN_INFO
-		       "btrfsic: error, cannot find state information on umount!\n");
+		pr_info("btrfsic: error, cannot find state information on umount!\n");
 		mutex_unlock(&btrfsic_mutex);
 		return;
 	}
@@ -3116,7 +3056,7 @@ void btrfsic_unmount(struct btrfs_root *root,
 		if (b_all->is_iodone || b_all->never_written)
 			btrfsic_block_free(b_all);
 		else
-			printk(KERN_INFO "btrfs: attempt to free %c-block @%llu (%s/%llu/%d) on umount which is not yet iodone!\n",
+			pr_info("btrfs: attempt to free %c-block @%llu (%s/%llu/%d) on umount which is not yet iodone!\n",
 			       btrfsic_get_block_type(state, b_all),
 			       b_all->logical_bytenr, b_all->dev_state->name,
 			       b_all->dev_bytenr, b_all->mirror_num);
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 029db6e..d635d0f 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -783,8 +783,7 @@ void __init btrfs_init_compress(void)
 		 */
 		workspace = btrfs_compress_op[i]->alloc_workspace();
 		if (IS_ERR(workspace)) {
-			printk(KERN_WARNING
-	"BTRFS: cannot preallocate compression workspace, will try later");
+			pr_warn("BTRFS: cannot preallocate compression workspace, will try later\n");
 		} else {
 			atomic_set(&btrfs_comp_ws[i].total_ws, 1);
 			btrfs_comp_ws[i].free_ws = 1;
@@ -854,8 +853,7 @@ again:
 					/* no burst */ 1);
 
 			if (__ratelimit(&_rs)) {
-				printk(KERN_WARNING
-			    "no compression workspaces, low memory, retrying");
+				pr_warn("no compression workspaces, low memory, retrying\n");
 			}
 		}
 		goto again;
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index aace5e1..86d08c2 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -4795,7 +4795,7 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
 		for (i = slot; i < nritems; i++) {
 			u32 ioff;
 
-			item = btrfs_item_nr( i);
+			item = btrfs_item_nr(i);
 			ioff = btrfs_token_item_offset(leaf, item, &token);
 			btrfs_set_token_item_offset(leaf, item,
 						    ioff - total_data, &token);
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 9267436..6683326 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1436,13 +1436,13 @@ static inline void btrfs_init_map_token (struct btrfs_map_token *token)
 #define cpu_to_le8(v) (v)
 #define __le8 u8
 
-#define read_eb_member(eb, ptr, type, member, result) (			\
+#define read_eb_member(eb, ptr, type, member, result) (\
 	read_extent_buffer(eb, (char *)(result),			\
 			   ((unsigned long)(ptr)) +			\
 			    offsetof(type, member),			\
 			   sizeof(((type *)0)->member)))
 
-#define write_eb_member(eb, ptr, type, member, result) (		\
+#define write_eb_member(eb, ptr, type, member, result) (\
 	write_extent_buffer(eb, (char *)(result),			\
 			   ((unsigned long)(ptr)) +			\
 			    offsetof(type, member),			\
@@ -3355,7 +3355,7 @@ do {									\
 	btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
 #else
 #define btrfs_debug(fs_info, fmt, args...) \
-    no_printk(KERN_DEBUG fmt, ##args)
+	no_printk(KERN_DEBUG fmt, ##args)
 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
 	no_printk(KERN_DEBUG fmt, ##args)
 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 33d46ff..c7f2cc8 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -427,7 +427,7 @@ static int btrfs_check_super_csum(char *raw_disk_sb)
 	}
 
 	if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) {
-		printk(KERN_ERR "BTRFS: unsupported checksum algorithm %u\n",
+		pr_err("BTRFS: unsupported checksum algorithm %u\n",
 				csum_type);
 		ret = 1;
 	}
@@ -4098,24 +4098,24 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	int ret = 0;
 
 	if (btrfs_super_magic(sb) != BTRFS_MAGIC) {
-		printk(KERN_ERR "BTRFS: no valid FS found\n");
+		pr_err("BTRFS: no valid FS found\n");
 		ret = -EINVAL;
 	}
 	if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP)
-		printk(KERN_WARNING "BTRFS: unrecognized super flag: %llu\n",
+		pr_warn("BTRFS: unrecognized super flag: %llu\n",
 				btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP);
 	if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) {
-		printk(KERN_ERR "BTRFS: tree_root level too big: %d >= %d\n",
+		pr_err("BTRFS: tree_root level too big: %d >= %d\n",
 				btrfs_super_root_level(sb), BTRFS_MAX_LEVEL);
 		ret = -EINVAL;
 	}
 	if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) {
-		printk(KERN_ERR "BTRFS: chunk_root level too big: %d >= %d\n",
+		pr_err("BTRFS: chunk_root level too big: %d >= %d\n",
 				btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL);
 		ret = -EINVAL;
 	}
 	if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) {
-		printk(KERN_ERR "BTRFS: log_root level too big: %d >= %d\n",
+		pr_err("BTRFS: log_root level too big: %d >= %d\n",
 				btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL);
 		ret = -EINVAL;
 	}
@@ -4126,22 +4126,22 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	 */
 	if (!is_power_of_2(sectorsize) || sectorsize < 4096 ||
 	    sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) {
-		printk(KERN_ERR "BTRFS: invalid sectorsize %llu\n", sectorsize);
+		pr_err("BTRFS: invalid sectorsize %llu\n", sectorsize);
 		ret = -EINVAL;
 	}
 	/* Only PAGE SIZE is supported yet */
 	if (sectorsize != PAGE_SIZE) {
-		printk(KERN_ERR "BTRFS: sectorsize %llu not supported yet, only support %lu\n",
+		pr_err("BTRFS: sectorsize %llu not supported yet, only support %lu\n",
 				sectorsize, PAGE_SIZE);
 		ret = -EINVAL;
 	}
 	if (!is_power_of_2(nodesize) || nodesize < sectorsize ||
 	    nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) {
-		printk(KERN_ERR "BTRFS: invalid nodesize %llu\n", nodesize);
+		pr_err("BTRFS: invalid nodesize %llu\n", nodesize);
 		ret = -EINVAL;
 	}
 	if (nodesize != le32_to_cpu(sb->__unused_leafsize)) {
-		printk(KERN_ERR "BTRFS: invalid leafsize %u, should be %llu\n",
+		pr_err("BTRFS: invalid leafsize %u, should be %llu\n",
 				le32_to_cpu(sb->__unused_leafsize),
 				nodesize);
 		ret = -EINVAL;
@@ -4149,23 +4149,23 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 
 	/* Root alignment check */
 	if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) {
-		printk(KERN_WARNING "BTRFS: tree_root block unaligned: %llu\n",
+		pr_warn("BTRFS: tree_root block unaligned: %llu\n",
 				btrfs_super_root(sb));
 		ret = -EINVAL;
 	}
 	if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) {
-		printk(KERN_WARNING "BTRFS: chunk_root block unaligned: %llu\n",
+		pr_warn("BTRFS: chunk_root block unaligned: %llu\n",
 				btrfs_super_chunk_root(sb));
 		ret = -EINVAL;
 	}
 	if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) {
-		printk(KERN_WARNING "BTRFS: log_root block unaligned: %llu\n",
+		pr_warn("BTRFS: log_root block unaligned: %llu\n",
 				btrfs_super_log_root(sb));
 		ret = -EINVAL;
 	}
 
 	if (memcmp(fs_info->fsid, sb->dev_item.fsid, BTRFS_UUID_SIZE) != 0) {
-		printk(KERN_ERR "BTRFS: dev_item UUID does not match fsid: %pU != %pU\n",
+		pr_err("BTRFS: dev_item UUID does not match fsid: %pU != %pU\n",
 				fs_info->fsid, sb->dev_item.fsid);
 		ret = -EINVAL;
 	}
@@ -4185,15 +4185,15 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 		ret = -EINVAL;
 	}
 	if (btrfs_super_num_devices(sb) > (1UL << 31))
-		printk(KERN_WARNING "BTRFS: suspicious number of devices: %llu\n",
+		pr_warn("BTRFS: suspicious number of devices: %llu\n",
 				btrfs_super_num_devices(sb));
 	if (btrfs_super_num_devices(sb) == 0) {
-		printk(KERN_ERR "BTRFS: number of devices is 0\n");
+		pr_err("BTRFS: number of devices is 0\n");
 		ret = -EINVAL;
 	}
 
 	if (btrfs_super_bytenr(sb) != BTRFS_SUPER_INFO_OFFSET) {
-		printk(KERN_ERR "BTRFS: super offset mismatch %llu != %u\n",
+		pr_err("BTRFS: super offset mismatch %llu != %u\n",
 				btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET);
 		ret = -EINVAL;
 	}
@@ -4203,14 +4203,14 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	 * and one chunk
 	 */
 	if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) {
-		printk(KERN_ERR "BTRFS: system chunk array too big %u > %u\n",
+		pr_err("BTRFS: system chunk array too big %u > %u\n",
 				btrfs_super_sys_array_size(sb),
 				BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
 		ret = -EINVAL;
 	}
 	if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key)
 			+ sizeof(struct btrfs_chunk)) {
-		printk(KERN_ERR "BTRFS: system chunk array too small %u < %zu\n",
+		pr_err("BTRFS: system chunk array too small %u < %zu\n",
 				btrfs_super_sys_array_size(sb),
 				sizeof(struct btrfs_disk_key)
 				+ sizeof(struct btrfs_chunk));
@@ -4222,13 +4222,11 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	 * but it's still possible that it's the one that's wrong.
 	 */
 	if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb))
-		printk(KERN_WARNING
-			"BTRFS: suspicious: generation < chunk_root_generation: %llu < %llu\n",
+		pr_warn("BTRFS: suspicious: generation < chunk_root_generation: %llu < %llu\n",
 			btrfs_super_generation(sb), btrfs_super_chunk_root_generation(sb));
 	if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb)
 	    && btrfs_super_cache_generation(sb) != (u64)-1)
-		printk(KERN_WARNING
-			"BTRFS: suspicious: generation < cache_generation: %llu < %llu\n",
+		pr_warn("BTRFS: suspicious: generation < cache_generation: %llu < %llu\n",
 			btrfs_super_generation(sb), btrfs_super_cache_generation(sb));
 
 	return ret;
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index d8bed44..07f0e91 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7914,12 +7914,12 @@ static void dump_space_info(struct btrfs_space_info *info, u64 bytes,
 	int index = 0;
 
 	spin_lock(&info->lock);
-	printk(KERN_INFO "BTRFS: space_info %llu has %llu free, is %sfull\n",
+	pr_info("BTRFS: space_info %llu has %llu free, is %sfull\n",
 	       info->flags,
 	       info->total_bytes - info->bytes_used - info->bytes_pinned -
 	       info->bytes_reserved - info->bytes_readonly -
 	       info->bytes_may_use, (info->full) ? "" : "not ");
-	printk(KERN_INFO "BTRFS: space_info total=%llu, used=%llu, pinned=%llu, reserved=%llu, may_use=%llu, readonly=%llu\n",
+	pr_info("BTRFS: space_info total=%llu, used=%llu, pinned=%llu, reserved=%llu, may_use=%llu, readonly=%llu\n",
 	       info->total_bytes, info->bytes_used, info->bytes_pinned,
 	       info->bytes_reserved, info->bytes_may_use,
 	       info->bytes_readonly);
@@ -7932,7 +7932,7 @@ static void dump_space_info(struct btrfs_space_info *info, u64 bytes,
 again:
 	list_for_each_entry(cache, &info->block_groups[index], list) {
 		spin_lock(&cache->lock);
-		printk(KERN_INFO "BTRFS: block group %llu has %llu bytes, %llu used %llu pinned %llu reserved %s\n",
+		pr_info("BTRFS: block group %llu has %llu bytes, %llu used %llu pinned %llu reserved %s\n",
 		       cache->key.objectid, cache->key.offset,
 		       btrfs_block_group_used(&cache->item), cache->pinned,
 		       cache->reserved, cache->ro ? "[readonly]" : "");
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 0fede81..6fdc701 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -74,7 +74,7 @@ void btrfs_leak_debug_check(void)
 
 	while (!list_empty(&buffers)) {
 		eb = list_entry(buffers.next, struct extent_buffer, leak_list);
-		printk(KERN_ERR "BTRFS: buffer leak start %llu len %lu refs %d\n",
+		pr_err("BTRFS: buffer leak start %llu len %lu refs %d\n",
 		       eb->start, eb->len, atomic_read(&eb->refs));
 		list_del(&eb->leak_list);
 		kmem_cache_free(extent_buffer_cache, eb);
@@ -459,7 +459,7 @@ static int insert_state(struct extent_io_tree *tree,
 	if (node) {
 		struct extent_state *found;
 		found = rb_entry(node, struct extent_state, rb_node);
-		printk(KERN_ERR "BTRFS: found node %llu %llu on insert of %llu %llu\n",
+		pr_err("BTRFS: found node %llu %llu on insert of %llu %llu\n",
 		       found->start, found->end, start, end);
 		return -EEXIST;
 	}
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index ea09fab..60dedf4 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2346,7 +2346,7 @@ out:
 	spin_unlock(&ctl->tree_lock);
 
 	if (ret) {
-		printk(KERN_CRIT "BTRFS: unable to add free space :%d\n", ret);
+		pr_crit("BTRFS: unable to add free space :%d\n", ret);
 		ASSERT(ret != -EEXIST);
 	}
 
diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c
index 1adfbe7..48655da 100644
--- a/fs/btrfs/lzo.c
+++ b/fs/btrfs/lzo.c
@@ -141,7 +141,7 @@ static int lzo_compress_pages(struct list_head *ws,
 		ret = lzo1x_1_compress(data_in, in_len, workspace->cbuf,
 				       &out_len, workspace->mem);
 		if (ret != LZO_E_OK) {
-			printk(KERN_DEBUG "BTRFS: deflate in loop returned %d\n",
+			pr_debug("BTRFS: deflate in loop returned %d\n",
 			       ret);
 			ret = -EIO;
 			goto out;
@@ -356,7 +356,7 @@ cont:
 		if (need_unmap)
 			kunmap(pages_in[page_in_index - 1]);
 		if (ret != LZO_E_OK) {
-			printk(KERN_WARNING "BTRFS: decompress failed\n");
+			pr_warn("BTRFS: decompress failed\n");
 			ret = -EIO;
 			break;
 		}
@@ -402,7 +402,7 @@ static int lzo_decompress(struct list_head *ws, unsigned char *data_in,
 	out_len = PAGE_SIZE;
 	ret = lzo1x_decompress_safe(data_in, in_len, workspace->buf, &out_len);
 	if (ret != LZO_E_OK) {
-		printk(KERN_WARNING "BTRFS: decompress failed!\n");
+		pr_warn("BTRFS: decompress failed!\n");
 		ret = -EIO;
 		goto out;
 	}
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index 2e317da6c..12017f4 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -24,11 +24,11 @@ static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
 {
 	int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
 	int i;
-	printk(KERN_INFO "\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
+	pr_info("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
 	       btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk),
 	       btrfs_chunk_type(eb, chunk), num_stripes);
 	for (i = 0 ; i < num_stripes ; i++) {
-		printk(KERN_INFO "\t\t\tstripe %d devid %llu offset %llu\n", i,
+		pr_info("\t\t\tstripe %d devid %llu offset %llu\n", i,
 		      btrfs_stripe_devid_nr(eb, chunk, i),
 		      btrfs_stripe_offset_nr(eb, chunk, i));
 	}
@@ -36,7 +36,7 @@ static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
 static void print_dev_item(struct extent_buffer *eb,
 			   struct btrfs_dev_item *dev_item)
 {
-	printk(KERN_INFO "\t\tdev item devid %llu total_bytes %llu bytes used %llu\n",
+	pr_info("\t\tdev item devid %llu total_bytes %llu bytes used %llu\n",
 	       btrfs_device_id(eb, dev_item),
 	       btrfs_device_total_bytes(eb, dev_item),
 	       btrfs_device_bytes_used(eb, dev_item));
@@ -44,7 +44,7 @@ static void print_dev_item(struct extent_buffer *eb,
 static void print_extent_data_ref(struct extent_buffer *eb,
 				  struct btrfs_extent_data_ref *ref)
 {
-	printk(KERN_INFO "\t\textent data backref root %llu objectid %llu offset %llu count %u\n",
+	pr_info("\t\textent data backref root %llu objectid %llu offset %llu count %u\n",
 	       btrfs_extent_data_ref_root(eb, ref),
 	       btrfs_extent_data_ref_objectid(eb, ref),
 	       btrfs_extent_data_ref_offset(eb, ref),
@@ -69,7 +69,7 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type)
 		struct btrfs_extent_item_v0 *ei0;
 		BUG_ON(item_size != sizeof(*ei0));
 		ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
-		printk(KERN_INFO "\t\textent refs %u\n",
+		pr_info("\t\textent refs %u\n",
 		       btrfs_extent_refs_v0(eb, ei0));
 		return;
 #else
@@ -80,7 +80,7 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type)
 	ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 	flags = btrfs_extent_flags(eb, ei);
 
-	printk(KERN_INFO "\t\textent refs %llu gen %llu flags %llu\n",
+	pr_info("\t\textent refs %llu gen %llu flags %llu\n",
 	       btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
 	       flags);
 
@@ -89,7 +89,7 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type)
 		struct btrfs_tree_block_info *info;
 		info = (struct btrfs_tree_block_info *)(ei + 1);
 		btrfs_tree_block_key(eb, info, &key);
-		printk(KERN_INFO "\t\ttree block key (%llu %u %llu) level %d\n",
+		pr_info("\t\ttree block key (%llu %u %llu) level %d\n",
 		       btrfs_disk_key_objectid(&key), key.type,
 		       btrfs_disk_key_offset(&key),
 		       btrfs_tree_block_level(eb, info));
@@ -106,10 +106,10 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type)
 		offset = btrfs_extent_inline_ref_offset(eb, iref);
 		switch (type) {
 		case BTRFS_TREE_BLOCK_REF_KEY:
-			printk(KERN_INFO "\t\ttree block backref root %llu\n", offset);
+			pr_info("\t\ttree block backref root %llu\n", offset);
 			break;
 		case BTRFS_SHARED_BLOCK_REF_KEY:
-			printk(KERN_INFO "\t\tshared block backref parent %llu\n", offset);
+			pr_info("\t\tshared block backref parent %llu\n", offset);
 			break;
 		case BTRFS_EXTENT_DATA_REF_KEY:
 			dref = (struct btrfs_extent_data_ref *)(&iref->offset);
@@ -117,7 +117,7 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type)
 			break;
 		case BTRFS_SHARED_DATA_REF_KEY:
 			sref = (struct btrfs_shared_data_ref *)(iref + 1);
-			printk(KERN_INFO "\t\tshared data backref parent %llu count %u\n",
+			pr_info("\t\tshared data backref parent %llu count %u\n",
 			       offset, btrfs_shared_data_ref_count(eb, sref));
 			break;
 		default:
@@ -154,7 +154,7 @@ static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
 		__le64 subvol_id;
 
 		read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
-		printk(KERN_INFO "\t\tsubvol_id %llu\n",
+		pr_info("\t\tsubvol_id %llu\n",
 		       (unsigned long long)le64_to_cpu(subvol_id));
 		item_size -= sizeof(u64);
 		offset += sizeof(u64);
@@ -188,13 +188,13 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 		item = btrfs_item_nr(i);
 		btrfs_item_key_to_cpu(l, &key, i);
 		type = key.type;
-		printk(KERN_INFO "\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
+		pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
 			i, key.objectid, type, key.offset,
 			btrfs_item_offset(l, item), btrfs_item_size(l, item));
 		switch (type) {
 		case BTRFS_INODE_ITEM_KEY:
 			ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
-			printk(KERN_INFO "\t\tinode generation %llu size %llu mode %o\n",
+			pr_info("\t\tinode generation %llu size %llu mode %o\n",
 			       btrfs_inode_generation(l, ii),
 			       btrfs_inode_size(l, ii),
 			       btrfs_inode_mode(l, ii));
@@ -202,13 +202,13 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 		case BTRFS_DIR_ITEM_KEY:
 			di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 			btrfs_dir_item_key_to_cpu(l, di, &found_key);
-			printk(KERN_INFO "\t\tdir oid %llu type %u\n",
+			pr_info("\t\tdir oid %llu type %u\n",
 				found_key.objectid,
 				btrfs_dir_type(l, di));
 			break;
 		case BTRFS_ROOT_ITEM_KEY:
 			ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
-			printk(KERN_INFO "\t\troot data bytenr %llu refs %u\n",
+			pr_info("\t\troot data bytenr %llu refs %u\n",
 				btrfs_disk_root_bytenr(l, ri),
 				btrfs_disk_root_refs(l, ri));
 			break;
@@ -217,10 +217,10 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 			print_extent_item(l, i, type);
 			break;
 		case BTRFS_TREE_BLOCK_REF_KEY:
-			printk(KERN_INFO "\t\ttree block backref\n");
+			pr_info("\t\ttree block backref\n");
 			break;
 		case BTRFS_SHARED_BLOCK_REF_KEY:
-			printk(KERN_INFO "\t\tshared block backref\n");
+			pr_info("\t\tshared block backref\n");
 			break;
 		case BTRFS_EXTENT_DATA_REF_KEY:
 			dref = btrfs_item_ptr(l, i,
@@ -230,7 +230,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 		case BTRFS_SHARED_DATA_REF_KEY:
 			sref = btrfs_item_ptr(l, i,
 					      struct btrfs_shared_data_ref);
-			printk(KERN_INFO "\t\tshared data backref count %u\n",
+			pr_info("\t\tshared data backref count %u\n",
 			       btrfs_shared_data_ref_count(l, sref));
 			break;
 		case BTRFS_EXTENT_DATA_KEY:
@@ -238,14 +238,14 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 					    struct btrfs_file_extent_item);
 			if (btrfs_file_extent_type(l, fi) ==
 			    BTRFS_FILE_EXTENT_INLINE) {
-				printk(KERN_INFO "\t\tinline extent data size %u\n",
+				pr_info("\t\tinline extent data size %u\n",
 				       btrfs_file_extent_inline_len(l, i, fi));
 				break;
 			}
-			printk(KERN_INFO "\t\textent data disk bytenr %llu nr %llu\n",
+			pr_info("\t\textent data disk bytenr %llu nr %llu\n",
 			       btrfs_file_extent_disk_bytenr(l, fi),
 			       btrfs_file_extent_disk_num_bytes(l, fi));
-			printk(KERN_INFO "\t\textent data offset %llu nr %llu ram %llu\n",
+			pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
 			       btrfs_file_extent_offset(l, fi),
 			       btrfs_file_extent_num_bytes(l, fi),
 			       btrfs_file_extent_ram_bytes(l, fi));
@@ -260,7 +260,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 		case BTRFS_BLOCK_GROUP_ITEM_KEY:
 			bi = btrfs_item_ptr(l, i,
 					    struct btrfs_block_group_item);
-			printk(KERN_INFO "\t\tblock group used %llu\n",
+			pr_info("\t\tblock group used %llu\n",
 			       btrfs_disk_block_group_used(l, bi));
 			break;
 		case BTRFS_CHUNK_ITEM_KEY:
@@ -274,36 +274,36 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 		case BTRFS_DEV_EXTENT_KEY:
 			dev_extent = btrfs_item_ptr(l, i,
 						    struct btrfs_dev_extent);
-			printk(KERN_INFO "\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n",
+			pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n",
 			       btrfs_dev_extent_chunk_tree(l, dev_extent),
 			       btrfs_dev_extent_chunk_objectid(l, dev_extent),
 			       btrfs_dev_extent_chunk_offset(l, dev_extent),
 			       btrfs_dev_extent_length(l, dev_extent));
 			break;
 		case BTRFS_PERSISTENT_ITEM_KEY:
-			printk(KERN_INFO "\t\tpersistent item objectid %llu offset %llu\n",
+			pr_info("\t\tpersistent item objectid %llu offset %llu\n",
 					key.objectid, key.offset);
 			switch (key.objectid) {
 			case BTRFS_DEV_STATS_OBJECTID:
-				printk(KERN_INFO "\t\tdevice stats\n");
+				pr_info("\t\tdevice stats\n");
 				break;
 			default:
-				printk(KERN_INFO "\t\tunknown persistent item\n");
+				pr_info("\t\tunknown persistent item\n");
 			}
 			break;
 		case BTRFS_TEMPORARY_ITEM_KEY:
-			printk(KERN_INFO "\t\ttemporary item objectid %llu offset %llu\n",
+			pr_info("\t\ttemporary item objectid %llu offset %llu\n",
 					key.objectid, key.offset);
 			switch (key.objectid) {
 			case BTRFS_BALANCE_OBJECTID:
-				printk(KERN_INFO "\t\tbalance status\n");
+				pr_info("\t\tbalance status\n");
 				break;
 			default:
-				printk(KERN_INFO "\t\tunknown temporary item\n");
+				pr_info("\t\tunknown temporary item\n");
 			}
 			break;
 		case BTRFS_DEV_REPLACE_KEY:
-			printk(KERN_INFO "\t\tdev replace\n");
+			pr_info("\t\tdev replace\n");
 			break;
 		case BTRFS_UUID_KEY_SUBVOL:
 		case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
@@ -334,7 +334,7 @@ void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
 		   (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
 	for (i = 0; i < nr; i++) {
 		btrfs_node_key_to_cpu(c, &key, i);
-		printk(KERN_INFO "\tkey %d (%llu %u %llu) block %llu\n",
+		pr_info("\tkey %d (%llu %u %llu) block %llu\n",
 		       i, key.objectid, key.type, key.offset,
 		       btrfs_node_blockptr(c, i));
 	}
diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 9e1bdaf..9e85300 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -820,7 +820,7 @@ static void dump_devs(struct btrfs_fs_info *fs_info, int all)
 
 	spin_lock(&fs_info->reada_lock);
 	list_for_each_entry(device, &fs_devices->devices, dev_list) {
-		printk(KERN_DEBUG "dev %lld has %d in flight\n", device->devid,
+		pr_debug("dev %lld has %d in flight\n", device->devid,
 			atomic_read(&device->reada_in_flight));
 		index = 0;
 		while (1) {
@@ -829,17 +829,17 @@ static void dump_devs(struct btrfs_fs_info *fs_info, int all)
 						     (void **)&zone, index, 1);
 			if (ret == 0)
 				break;
-			printk(KERN_DEBUG "  zone %llu-%llu elems %llu locked %d devs",
+			pr_debug("  zone %llu-%llu elems %llu locked %d devs",
 			       zone->start, zone->end, zone->elems,
 			       zone->locked);
 			for (j = 0; j < zone->ndevs; ++j) {
-				printk(KERN_CONT " %lld",
+				pr_cont(" %lld",
 					zone->devs[j]->devid);
 			}
 			if (device->reada_curr_zone == zone)
-				printk(KERN_CONT " curr off %llu",
+				pr_cont(" curr off %llu",
 					device->reada_next - zone->start);
-			printk(KERN_CONT "\n");
+			pr_cont("\n");
 			index = (zone->end >> PAGE_SHIFT) + 1;
 		}
 		cnt = 0;
@@ -851,21 +851,20 @@ static void dump_devs(struct btrfs_fs_info *fs_info, int all)
 						     (void **)&re, index, 1);
 			if (ret == 0)
 				break;
-			printk(KERN_DEBUG
-				"  re: logical %llu size %u empty %d scheduled %d",
+			pr_debug("  re: logical %llu size %u empty %d scheduled %d",
 				re->logical, fs_info->tree_root->nodesize,
 				list_empty(&re->extctl), re->scheduled);
 
 			for (i = 0; i < re->nzones; ++i) {
-				printk(KERN_CONT " zone %llu-%llu devs",
+				pr_cont(" zone %llu-%llu devs",
 					re->zones[i]->start,
 					re->zones[i]->end);
 				for (j = 0; j < re->zones[i]->ndevs; ++j) {
-					printk(KERN_CONT " %lld",
+					pr_cont(" %lld",
 						re->zones[i]->devs[j]->devid);
 				}
 			}
-			printk(KERN_CONT "\n");
+			pr_cont("\n");
 			index = (re->logical >> PAGE_SHIFT) + 1;
 			if (++cnt > 15)
 				break;
@@ -885,20 +884,19 @@ static void dump_devs(struct btrfs_fs_info *fs_info, int all)
 			index = (re->logical >> PAGE_SHIFT) + 1;
 			continue;
 		}
-		printk(KERN_DEBUG
-			"re: logical %llu size %u list empty %d scheduled %d",
+		pr_debug("re: logical %llu size %u list empty %d scheduled %d",
 			re->logical, fs_info->tree_root->nodesize,
 			list_empty(&re->extctl), re->scheduled);
 		for (i = 0; i < re->nzones; ++i) {
-			printk(KERN_CONT " zone %llu-%llu devs",
+			pr_cont(" zone %llu-%llu devs",
 				re->zones[i]->start,
 				re->zones[i]->end);
 			for (j = 0; j < re->zones[i]->ndevs; ++j) {
-				printk(KERN_CONT " %lld",
+				pr_cont(" %lld",
 				       re->zones[i]->devs[j]->devid);
 			}
 		}
-		printk(KERN_CONT "\n");
+		pr_cont("\n");
 		index = (re->logical >> PAGE_SHIFT) + 1;
 	}
 	spin_unlock(&fs_info->reada_lock);
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 9802d51..52f5835 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -151,12 +151,11 @@ void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function
 		vaf.fmt = fmt;
 		vaf.va = &args;
 
-		printk(KERN_CRIT
-			"BTRFS: error (device %s) in %s:%d: errno=%d %s (%pV)\n",
+		pr_crit("BTRFS: error (device %s) in %s:%d: errno=%d %s (%pV)\n",
 			sb->s_id, function, line, errno, errstr, &vaf);
 		va_end(args);
 	} else {
-		printk(KERN_CRIT "BTRFS: error (device %s) in %s:%d: errno=%d %s\n",
+		pr_crit("BTRFS: error (device %s) in %s:%d: errno=%d %s\n",
 			sb->s_id, function, line, errno, errstr);
 	}
 #endif
@@ -925,8 +924,7 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags,
 			}
 			break;
 		case Opt_subvolrootid:
-			printk(KERN_WARNING
-				"BTRFS: 'subvolrootid' mount option is deprecated and has no effect\n");
+			pr_warn("BTRFS: 'subvolrootid' mount option is deprecated and has no effect\n");
 			break;
 		case Opt_device:
 			device_name = match_strdup(&args[0]);
@@ -1150,7 +1148,7 @@ static int btrfs_fill_super(struct super_block *sb,
 	sb->s_iflags |= SB_I_CGROUPWB;
 	err = open_ctree(sb, fs_devices, (char *)data);
 	if (err) {
-		printk(KERN_ERR "BTRFS: open_ctree failed\n");
+		pr_err("BTRFS: open_ctree failed\n");
 		return err;
 	}
 
@@ -2356,7 +2354,7 @@ static void btrfs_interface_exit(void)
 
 static void btrfs_print_mod_info(void)
 {
-	printk(KERN_INFO "Btrfs loaded, crc32c=%s"
+	pr_info("Btrfs loaded, crc32c=%s"
 #ifdef CONFIG_BTRFS_DEBUG
 			", debug=on"
 #endif
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index e5ddfba..0dbf81f 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -77,7 +77,7 @@ static int can_modify_feature(struct btrfs_feature_attr *fa)
 		clear = BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR;
 		break;
 	default:
-		printk(KERN_WARNING "btrfs: sysfs: unknown feature set %d\n",
+		pr_warn("btrfs: sysfs: unknown feature set %d\n",
 				fa->feature_set);
 		return 0;
 	}
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 7a441c8..5478f50 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -65,7 +65,7 @@ void btrfs_put_transaction(struct btrfs_transaction *transaction)
 		BUG_ON(!list_empty(&transaction->list));
 		WARN_ON(!RB_EMPTY_ROOT(&transaction->delayed_refs.href_root));
 		if (transaction->delayed_refs.pending_csums)
-			printk(KERN_ERR "pending csums is %llu\n",
+			pr_err("pending csums is %llu\n",
 			       transaction->delayed_refs.pending_csums);
 		while (!list_empty(&transaction->pending_chunks)) {
 			struct extent_map *em;
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index dda23b7..89c499e 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1140,12 +1140,12 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
 	ret = device_list_add(path, disk_super, devid, fs_devices_ret);
 	if (ret > 0) {
 		if (disk_super->label[0]) {
-			printk(KERN_INFO "BTRFS: device label %s ", disk_super->label);
+			pr_info("BTRFS: device label %s ", disk_super->label);
 		} else {
-			printk(KERN_INFO "BTRFS: device fsid %pU ", disk_super->fsid);
+			pr_info("BTRFS: device fsid %pU ", disk_super->fsid);
 		}
 
-		printk(KERN_CONT "devid %llu transid %llu %s\n", devid, transid, path);
+		pr_cont("devid %llu transid %llu %s\n", devid, transid, path);
 		ret = 0;
 	}
 	if (!ret && fs_devices_ret)
@@ -5911,13 +5911,13 @@ int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
 	read_unlock(&em_tree->lock);
 
 	if (!em) {
-		printk(KERN_ERR "BTRFS: couldn't find em for chunk %Lu\n",
+		pr_err("BTRFS: couldn't find em for chunk %Lu\n",
 		       chunk_start);
 		return -EIO;
 	}
 
 	if (em->start != chunk_start) {
-		printk(KERN_ERR "BTRFS: bad chunk start, em=%Lu, wanted=%Lu\n",
+		pr_err("BTRFS: bad chunk start, em=%Lu, wanted=%Lu\n",
 		       em->start, chunk_start);
 		free_extent_map(em);
 		return -EIO;
@@ -6719,8 +6719,7 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 
 			num_stripes = btrfs_chunk_num_stripes(sb, chunk);
 			if (!num_stripes) {
-				printk(KERN_ERR
-	    "BTRFS: invalid number of stripes %u in sys_array at offset %u\n",
+				pr_err("BTRFS: invalid number of stripes %u in sys_array at offset %u\n",
 					num_stripes, cur_offset);
 				ret = -EIO;
 				break;
@@ -6743,8 +6742,7 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 			if (ret)
 				break;
 		} else {
-			printk(KERN_ERR
-		"BTRFS: unexpected item type %u in sys_array at offset %u\n",
+			pr_err("BTRFS: unexpected item type %u in sys_array at offset %u\n",
 				(u32)key.type, cur_offset);
 			ret = -EIO;
 			break;
@@ -6758,7 +6756,7 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 	return ret;
 
 out_short_read:
-	printk(KERN_ERR "BTRFS: sys_array too short to read %u bytes at offset %u\n",
+	pr_err("BTRFS: sys_array too short to read %u bytes at offset %u\n",
 			len, cur_offset);
 	clear_extent_buffer_uptodate(sb);
 	free_extent_buffer_stale(sb);
diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c
index 88d274e..441b81a 100644
--- a/fs/btrfs/zlib.c
+++ b/fs/btrfs/zlib.c
@@ -95,7 +95,7 @@ static int zlib_compress_pages(struct list_head *ws,
 	*total_in = 0;
 
 	if (Z_OK != zlib_deflateInit(&workspace->strm, 3)) {
-		printk(KERN_WARNING "BTRFS: deflateInit failed\n");
+		pr_warn("BTRFS: deflateInit failed\n");
 		ret = -EIO;
 		goto out;
 	}
@@ -123,7 +123,7 @@ static int zlib_compress_pages(struct list_head *ws,
 	while (workspace->strm.total_in < len) {
 		ret = zlib_deflate(&workspace->strm, Z_SYNC_FLUSH);
 		if (ret != Z_OK) {
-			printk(KERN_DEBUG "BTRFS: deflate in loop returned %d\n",
+			pr_debug("BTRFS: deflate in loop returned %d\n",
 			       ret);
 			zlib_deflateEnd(&workspace->strm);
 			ret = -EIO;
@@ -249,7 +249,7 @@ static int zlib_decompress_biovec(struct list_head *ws, struct page **pages_in,
 	}
 
 	if (Z_OK != zlib_inflateInit2(&workspace->strm, wbits)) {
-		printk(KERN_WARNING "BTRFS: inflateInit failed\n");
+		pr_warn("BTRFS: inflateInit failed\n");
 		return -EIO;
 	}
 	while (workspace->strm.total_in < srclen) {
@@ -339,7 +339,7 @@ static int zlib_decompress(struct list_head *ws, unsigned char *data_in,
 	}
 
 	if (Z_OK != zlib_inflateInit2(&workspace->strm, wbits)) {
-		printk(KERN_WARNING "BTRFS: inflateInit failed\n");
+		pr_warn("BTRFS: inflateInit failed\n");
 		return -EIO;
 	}
 
