kfree() is safe to call on a NULL pointer.

This is true.

Despite that, you have found several instances of similar constructs:

Yes. - Special source code search pattern can point such places out
for further considerations.

Didn't it occur to you that maybe those constructs are fine the way
they are and this is the idiomatic way to write that kind of code?

Such a programming approach might look convenient. - I would prefer
a safer coding style for the corresponding exception handling.

Why are you submitting patches implementing changes that have already
been rejected?

The feedback to my update mixture is varying between acceptance and
disagreements as usual.

Judging from your recent submissions, it seems that this process is not
working well for you. I'm probably not the only one that is wonderign
what are you trying to obtain with your patch submissions, other than
having your name in the git log.

I am picking some change possibilities up in the hope of related
software improvements.

Regards,
Markus