linux-kernel - Re: [PATCH 2.6.25-rc7 resubmit] Fix itimer/many thread hang.

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Date:	Tue, 1 Apr 2008 11:45:46 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Frank Mayhar <fmayhar@...gle.com>
Cc:	roland@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.25-rc7 resubmit] Fix itimer/many thread hang.

On Fri, 28 Mar 2008 15:46:40 -0700
Frank Mayhar <fmayhar@...gle.com> wrote:

>  asmlinkage long sys_times(struct tms __user * tbuf)
>  {
> +	struct thread_group_cputime thread_group_times;
> +
>  	/*
>  	 *	In the SMP world we might just be unlucky and have one of
>  	 *	the times increment as we use it. Since the value is an
> @@ -873,19 +875,28 @@ asmlinkage long sys_times(struct tms __user * tbuf)
>  	if (tbuf) {
>  		struct tms tmp;
>  		struct task_struct *tsk = current;
> -		struct task_struct *t;
>  		cputime_t utime, stime, cutime, cstime;
>  
>  		spin_lock_irq(&tsk->sighand->siglock);
> -		utime = tsk->signal->utime;
> -		stime = tsk->signal->stime;
> -		t = tsk;
> -		do {
> -			utime = cputime_add(utime, t->utime);
> -			stime = cputime_add(stime, t->stime);
> -			t = next_thread(t);
> -		} while (t != tsk);
> -
> +		/*
> +		 * If a POSIX interval timer is running use the process-wide
> +		 * fields, else fall back to brute force.
> +		 */
> +		if (sig->thread_group_times) {

kernel/sys.c: In function 'sys_times':
kernel/sys.c:885: error: 'sig' undeclared (first use in this function)
--
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