btrfs: fix message printing

Fix various messages to include newline and module prefix.
Signed-off-by: Daniel J Blueman <daniel@quora.org>

fs/btrfs/super.c

@@ -243,7 +243,7 @@ void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
 			       struct btrfs_root *root, const char *function,
 			       unsigned int line, int errno)
 {
-	WARN_ONCE(1, KERN_DEBUG "btrfs: Transaction aborted");
+	WARN_ONCE(1, KERN_DEBUG "btrfs: Transaction aborted\n");
 	trans->aborted = errno;
 	/* Nothing used. The other threads that have joined this
 	 * transaction may be able to continue. */
@@ -549,11 +549,11 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
 			btrfs_set_opt(info->mount_opt, ENOSPC_DEBUG);
 			break;
 		case Opt_defrag:
-			printk(KERN_INFO "btrfs: enabling auto defrag");
+			printk(KERN_INFO "btrfs: enabling auto defrag\n");
 			btrfs_set_opt(info->mount_opt, AUTO_DEFRAG);
 			break;
 		case Opt_recovery:
-			printk(KERN_INFO "btrfs: enabling auto recovery");
+			printk(KERN_INFO "btrfs: enabling auto recovery\n");
 			btrfs_set_opt(info->mount_opt, RECOVERY);
 			break;
 		case Opt_skip_balance:
@@ -1602,7 +1602,7 @@ static int btrfs_interface_init(void)
 static void btrfs_interface_exit(void)
 {
 	if (misc_deregister(&btrfs_misc) < 0)
-		printk(KERN_INFO "misc_deregister failed for control device");
+		printk(KERN_INFO "btrfs: misc_deregister failed for control device\n");
 }
 
 static int __init init_btrfs_fs(void)

fs/btrfs/volumes.c

@@ -639,7 +639,7 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
 
 		bdev = blkdev_get_by_path(device->name->str, flags, holder);
 		if (IS_ERR(bdev)) {
-			printk(KERN_INFO "open %s failed\n", device->name->str);
+			printk(KERN_INFO "btrfs: open %s failed\n", device->name->str);
 			goto error;
 		}
 		filemap_write_and_wait(bdev->bd_inode->i_mapping);
@@ -3769,7 +3769,7 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
 	read_unlock(&em_tree->lock);
 
 	if (!em) {
-		printk(KERN_CRIT "unable to find logical %llu len %llu\n",
+		printk(KERN_CRIT "btrfs: unable to find logical %llu len %llu\n",
 		       (unsigned long long)logical,
 		       (unsigned long long)*length);
 		BUG();
@@ -4226,7 +4226,7 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
 
 	total_devs = bbio->num_stripes;
 	if (map_length < length) {
-		printk(KERN_CRIT "mapping failed logical %llu bio len %llu "
+		printk(KERN_CRIT "btrfs: mapping failed logical %llu bio len %llu "
 		       "len %llu\n", (unsigned long long)logical,
 		       (unsigned long long)length,
 		       (unsigned long long)map_length);

fs/btrfs/zlib.c

@@ -97,7 +97,7 @@ static int zlib_compress_pages(struct list_head *ws,
 	*total_in = 0;
 
 	if (Z_OK != zlib_deflateInit(&workspace->def_strm, 3)) {
-		printk(KERN_WARNING "deflateInit failed\n");
+		printk(KERN_WARNING "btrfs: deflateInit failed\n");
 		ret = -1;
 		goto out;
 	}
@@ -125,7 +125,7 @@ static int zlib_compress_pages(struct list_head *ws,
 	while (workspace->def_strm.total_in < len) {
 		ret = zlib_deflate(&workspace->def_strm, Z_SYNC_FLUSH);
 		if (ret != Z_OK) {
-			printk(KERN_DEBUG "btrfs deflate in loop returned %d\n",
+			printk(KERN_DEBUG "btrfs: deflate in loop returned %d\n",
 			       ret);
 			zlib_deflateEnd(&workspace->def_strm);
 			ret = -1;
@@ -252,7 +252,7 @@ static int zlib_decompress_biovec(struct list_head *ws, struct page **pages_in,
 	}
 
 	if (Z_OK != zlib_inflateInit2(&workspace->inf_strm, wbits)) {
-		printk(KERN_WARNING "inflateInit failed\n");
+		printk(KERN_WARNING "btrfs: inflateInit failed\n");
 		return -1;
 	}
 	while (workspace->inf_strm.total_in < srclen) {
@@ -336,7 +336,7 @@ static int zlib_decompress(struct list_head *ws, unsigned char *data_in,
 	}
 
 	if (Z_OK != zlib_inflateInit2(&workspace->inf_strm, wbits)) {
-		printk(KERN_WARNING "inflateInit failed\n");
+		printk(KERN_WARNING "btrfs: inflateInit failed\n");
 		return -1;
 	}