Re: [patch] new sys_tkill2() system call, 2.5.70

[Linus Torvalds]

On Tue, 3 Jun 2003, Ingo Molnar wrote:
> 
> are you suggesting to extend sys_tgkill() functionality to also detect -1
> for the PID, and do a process-signal send?

I don't care much, but that zero special case is definitely not a good 
idea.

You might make the thing acceptable to me by just removing the "zero means 
everythign", and replacing that logic with

	if (!tgid)
		tgid = current->tgid;

which is similar to how we handle zeroes in some other places. In other 
words, a zero is not a "wildcard", it means "_this_ thread group".

		Linus