if (uniq_len && memcmp(ent->uniquifier, fscache_uniq, uniq_len))
                        continue;
 
-               errorf(fc, "ceph: fscache cookie already registered for fsid %pU, use fsc=<uniquifier> option",
+               errorfc(fc, "fscache cookie already registered for fsid %pU, use fsc=<uniquifier> option",
                       fsid);
                err = -EBUSY;
                goto out_unlock;
                list_add_tail(&ent->list, &ceph_fscache_list);
        } else {
                kfree(ent);
-               errorf(fc, "ceph: unable to register fscache cookie for fsid %pU",
+               errorfc(fc, "unable to register fscache cookie for fsid %pU",
                       fsid);
                /* all other fs ignore this error */
        }
 
 
        dout("%s '%s'\n", __func__, dev_name);
        if (!dev_name || !*dev_name)
-               return invalf(fc, "ceph: Empty source");
+               return invalfc(fc, "Empty source");
 
        dev_name_end = strchr(dev_name, '/');
        if (dev_name_end) {
 
        dev_name_end--;         /* back up to ':' separator */
        if (dev_name_end < dev_name || *dev_name_end != ':')
-               return invalf(fc, "ceph: No path or : separator in source");
+               return invalfc(fc, "No path or : separator in source");
 
        dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name);
        if (fsopt->server_path)
                break;
        case Opt_source:
                if (fc->source)
-                       return invalf(fc, "ceph: Multiple sources specified");
+                       return invalfc(fc, "Multiple sources specified");
                return ceph_parse_source(param, fc);
        case Opt_wsize:
                if (result.uint_32 < PAGE_SIZE ||
                }
                break;
 #else
-               return invalf(fc, "ceph: fscache support is disabled");
+               return invalfc(fc, "fscache support is disabled");
 #endif
        case Opt_poolperm:
                if (!result.negated)
 #ifdef CONFIG_CEPH_FS_POSIX_ACL
                        fc->sb_flags |= SB_POSIXACL;
 #else
-                       return invalf(fc, "ceph: POSIX ACL support is disabled");
+                       return invalfc(fc, "POSIX ACL support is disabled");
 #endif
                } else {
                        fc->sb_flags &= ~SB_POSIXACL;
        return 0;
 
 out_of_range:
-       return invalf(fc, "ceph: %s out of range", param->key);
+       return invalfc(fc, "%s out of range", param->key);
 }
 
 static void destroy_mount_options(struct ceph_mount_options *args)
        dout("ceph_get_tree\n");
 
        if (!fc->source)
-               return invalf(fc, "ceph: No source");
+               return invalfc(fc, "No source");
 
 #ifdef CONFIG_CEPH_FS_POSIX_ACL
        fc->sb_flags |= SB_POSIXACL;