From owner-freebsd-hackers  Fri Jul  6  6:47:39 2001
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Date: Fri, 6 Jul 2001 09:48:26 -0400 (EDT)
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From: Evan Sarmiento <kaworu@sektor7.ath.cx>
To: freebsd-hackers@freebsd.org
Subject: LIST_NEXT()
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Hello,

I'm writing a kernel module, and it involves traversing the proc list searching for the right structure,
however, when I use SLIST_NEXT(p, p_list) in the program, I get a warning when I compile it: 

warning: statement with mo effect

What am I doing wrong? I've read the manpages on queue and looked at the proc structure.

Here's the code:
int
prfw_setflags(p, uap)
struct proc *p;
struct prfw_setflags_args *uap;
{
...
if (uap->id) {
 while (uap->id != p->p_pid)
  LIST_NEXT(p, p_list);
}

...
}

Thanks a lot.
Evan Sarmiento


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