That commit is correct (4c48abe91be03d191d0c20cc755877da2cb35622), but it was not in 4.12 as cut by linus.

https://github.com/torvalds/linux/commit/4c48abe91be03d191d0... (click the little '...' to expand tags it's in) or:

    $ git tag --contains 4c48abe91be03d191d0c20cc755877da2cb35622
    v4.13

What is your methodology that gets that it is in the 4.12 tree?