What is siginitsetinv

Hello masters,

           Can any one tell me what is siginitsetinv\(\) function in kernel. 

I have seen that function called in many codes. And that function is defined in linux/signal.h . But i couldnt understand a thing .Can anyone help me.

I do not know much about it - it is called to block all the signals except those in the second argument (OR'ed list of signal values), for the first process context argument.

It is called in drivers during setting up kernel threads. More than that I do not know.