Copy Last week, Linux kernel contributor Qu Wenruo scolded another code donor, Zhen Lei, for wasting kernel maintainers' time with unnecessary patches. In a post to Zhen Lei and the rest of the Linux kernel mailing list, Wenruo said he recently found a patch removing a debug out-of-memory error message from a selftest used by btrfs, a file system supported by the Linux kernel. "It's nothing special, some small cleanup work from some kernel newbie," wrote Wenruo. "But the mail address makes me cautious, '@huawei.com'." This is not the first time similar harmless "cleanup" patches have come from Huawei, said Wenruo, who observed those fixes were also "useless."