NAK: CMNT: [SRU][J/N:linux][PATCH 0/4] Backport upstream patches for powerpc kselftests

[Po-Hsu Lin]

Hello Zixing,

A few things after a review, please:
* Modify LP: #2141536 using an SRU template. Add the affected packages and nominate the series.
* Use the aforementioned SRU template for the cover letter.
* Add the BugLink with the correct format to each commit that you want to add.
* Add your Signed-off-by line to each commit.
* Add cherry-pick / backport information to each commit.
* Modify the kernel in mail title, it should be just [J/N].

Examples can be found on our mailing list.
Thanks for fixing this.
Sam