what is difference between busy waitng and spin lock?

Question

https://gateoverflow.in/?qa=blob&qa_blobid=10456887729102921117

Answer 1

ohhh i was wrong basically wht i read was just a small example of spin lock . the exact definition is here .
a spinlock is a lock which causes a thread trying to acquire it to simply wait in a loop ("spin") while repeatedly checking if the lock is available. Since the thread remains active but is not performing a useful task, the use of such a lock is a kind of busy waiting.. 

so its kind of busy waiting

Answer 2

Spin locks are kernel-defined, kernel-mode-only synchronization mechanisms. https://msdn.microsoft.com/en-us/library/windows/hardware/ff548114(v=vs.85).aspx

While busy waiting is not limited to kernel only, busy waiting is a broader scope.