How Can You Tell if Patch Was Installed?

[Bob Perry]

Hello,
Just applied the tcp47.patch patch to my system and I anticipated output
to the uname -r command that would reflect "p3".  Instead the results were
unchanged. 

uname -r
4.9-RELEASE-p2

I applied the patch to the current GENERIC kernel, customized the kernel
slightly, then recompiled it.

How can I determine if the patch was successfully applied or not?  Should I
have applied the patch to the GENERIC kernel, then recompiled it before
customizing it?

Thanks,
Bob

-- 
I've learned that whatever hits the fan will not be evenly
distributed.

FreeBSD 4.9-RELEASE-p2 #0