Vivek,
If you are only upgrading/patching kernel, it would be a lot better if you use the classical kernel patch/upgrade approach i.e backing up the kernel and loading the new kernel in /sapmnt/<SID>/exe and then synchronizing the kernel to local installation directory.
This above method is usually fail-safe and fast.
Moreover, JSPM is out of support now, SUM has taken over the JSPM tool for maintenance tasks.
~Akshay