NACK: CMNT: [SRU][J][PATCH v4 0/2] Fix time-out issues on powerpc when running ubuntu_kernel_selftests

[Po-Hsu Lin]

Hi Zixing,
two things to note for this patchset:
1. The title does not match, [J] in cover letter but [Q] in the patch.
2. Cover letter needs to be updated as it contains 4 patches.

And one suggestion, a short explanation about why a backport is needed
in the patch might be useful for reviewers.
You will find examples in our kernel tree.

Thanks!