btrfs: convert pr_* to btrfs_* where possible

For many printks, we want to know which file system issued the message.

This patch converts most pr_* calls to use the btrfs_* versions instead.
In some cases, this means adding plumbing to allow call sites access to
an fs_info pointer.

fs/btrfs/check-integrity.c is left alone for another day.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h
index 3af651c..363fdd9 100644
--- a/fs/btrfs/free-space-cache.h
+++ b/fs/btrfs/free-space-cache.h
@@ -89,13 +89,15 @@
 			      struct inode *inode);
 
 void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
-int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl,
+int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
+			   struct btrfs_free_space_ctl *ctl,
 			   u64 bytenr, u64 size);
 static inline int
 btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
 		     u64 bytenr, u64 size)
 {
-	return __btrfs_add_free_space(block_group->free_space_ctl,
+	return __btrfs_add_free_space(block_group->fs_info,
+				      block_group->free_space_ctl,
 				      bytenr, size);
 }
 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,