Hello:

This patch was applied to bpf/bpf.git (master)
by Daniel Borkmann [off-list ref]:

On Mon, 15 Nov 2021 14:07:41 +0100 you wrote:

Since recent Kbuild updates we no longer include files from compiler
directories. However, samples/bpf/hbm_kern.h hasn't been tuned for
this (LLVM 13):

  CLANG-bpf  samples/bpf/hbm_out_kern.o
In file included from samples/bpf/hbm_out_kern.c:55:
samples/bpf/hbm_kern.h:12:10: fatal error: 'stddef.h' file not found
         ^~~~~~~~~~
1 error generated.
  CLANG-bpf  samples/bpf/hbm_edt_kern.o
In file included from samples/bpf/hbm_edt_kern.c:53:
samples/bpf/hbm_kern.h:12:10: fatal error: 'stddef.h' file not found
         ^~~~~~~~~~
1 error generated.

[...]

Here is the summary with links:
  - [bpf] samples: bpf: fix build error due to -isystem removal
    https://git.kernel.org/bpf/bpf/c/6e528ca494d4

You are awesome, thank you!
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