Adding a new system call in Linux kernel 3.3

Question

I am very new to this kernel thing. What I want to do is just add a new system call to the kernel. I was following this guideline: http://hekimian-williams.com/?p=20.

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Answer 1

I think in kernel 3.3 its shifted here

http://lxr.free-electrons.com/source/arch/x86/syscalls/