The following is an example CL for the chromeos-4.14 kernel:

https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/1130448/4

A Comment says:
The following build(s) failed:

coral-paladin: The HWTest [bvt-inline] [astronaut] stage failed: ** HWTest failed (code 1) ** in https://luci-milo.appspot.com/buildbot/chromeos/coral-paladin/3871

Your change may have caused this failure. There are also other changes that may be at fault: 69 other changes. See the blamelist for more details.

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However, there is no way that this CL caused this failure, since coral-paladin [astronaut] uses a chromeos-4.4 kernel, and this patch was to the chromeos-4.14 kernel.

There is an "Exonerator" in place that should allow board-specific CLs to be submitted despite failures in the same run for unrelated boards.  Can we extend this functionality to include kernel patches being exonerated for failures devices that use a different kernel?