Hello:

This patch was applied to bpf/bpf.git (refs/heads/master):

On Mon, 28 Jun 2021 17:18:15 +0800 you wrote:

Execute the following command and exit, then execute it again, the
following error will be reported.

$ sudo ./samples/bpf/xdpsock -i ens4f2 -M
^C
$ sudo ./samples/bpf/xdpsock -i ens4f2 -M
libbpf: elf: skipping unrecognized data section(16) .eh_frame
libbpf: elf: skipping relo section(17) .rel.eh_frame for section(16) .eh_frame
libbpf: Kernel error message: XDP program already attached
ERROR: link set xdp fd failed

[...]

Here is the summary with links:
  - [bpf] samples/bpf: Fix xdpsock with '-M' parameter missing unload process
    https://git.kernel.org/bpf/bpf/c/2620e92ae6ed

You are awesome, thank you!
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