Btrfs: convert printk to btrfs_ and fix BTRFS prefix

Convert all applicable cases of printk and pr_* to the btrfs_* macros.

Fix all uses of the BTRFS prefix.

Signed-off-by: Frank Holton <fholton@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index 9a89ceb..a0691df 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -459,7 +459,7 @@
 	u8 type = btrfs_dir_type(leaf, dir_item);
 
 	if (type >= BTRFS_FT_MAX) {
-		printk(KERN_CRIT "btrfs: invalid dir item type: %d\n",
+		btrfs_crit(root->fs_info, "invalid dir item type: %d",
 		       (int)type);
 		return 1;
 	}
@@ -468,7 +468,7 @@
 		namelen = XATTR_NAME_MAX;
 
 	if (btrfs_dir_name_len(leaf, dir_item) > namelen) {
-		printk(KERN_CRIT "btrfs: invalid dir item name len: %u\n",
+		btrfs_crit(root->fs_info, "invalid dir item name len: %u",
 		       (unsigned)btrfs_dir_data_len(leaf, dir_item));
 		return 1;
 	}
@@ -476,7 +476,7 @@
 	/* BTRFS_MAX_XATTR_SIZE is the same for all dir items */
 	if ((btrfs_dir_data_len(leaf, dir_item) +
 	     btrfs_dir_name_len(leaf, dir_item)) > BTRFS_MAX_XATTR_SIZE(root)) {
-		printk(KERN_CRIT "btrfs: invalid dir item name + data len: %u + %u\n",
+		btrfs_crit(root->fs_info, "invalid dir item name + data len: %u + %u",
 		       (unsigned)btrfs_dir_name_len(leaf, dir_item),
 		       (unsigned)btrfs_dir_data_len(leaf, dir_item));
 		return 1;