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/qgroup.c b/fs/btrfs/qgroup.c
index 0f9df5a..11f4fff 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -2257,10 +2257,11 @@
 					 &fs_info->qgroup_rescan_progress,
 					 path, 1, 0);
 
-	pr_debug("current progress key (%llu %u %llu), search_slot ret %d\n",
-		 fs_info->qgroup_rescan_progress.objectid,
-		 fs_info->qgroup_rescan_progress.type,
-		 fs_info->qgroup_rescan_progress.offset, ret);
+	btrfs_debug(fs_info,
+		"current progress key (%llu %u %llu), search_slot ret %d",
+		fs_info->qgroup_rescan_progress.objectid,
+		fs_info->qgroup_rescan_progress.type,
+		fs_info->qgroup_rescan_progress.offset, ret);
 
 	if (ret) {
 		/*
@@ -2390,7 +2391,7 @@
 	ret = update_qgroup_status_item(trans, fs_info, fs_info->quota_root);
 	if (ret < 0) {
 		err = ret;
-		btrfs_err(fs_info, "fail to update qgroup status: %d\n", err);
+		btrfs_err(fs_info, "fail to update qgroup status: %d", err);
 	}
 	btrfs_end_transaction(trans, fs_info->quota_root);