Re: [patch] drivers: wait for threaded probes between initcall levels

[Linus Torvalds]

On Fri, 27 Oct 2006, Linus Torvalds wrote:

> 
> 	static int do_in_parallel(void *arg)
> 	{
> 		struct thread_exec *p = arg;
> 		int (*fn)(void *) = p->fn;
> 		void *arg = p->arg;
> 		int retval;
> 
> 		/* Tell the caller we are done with the arguments */
> 		complete(&p->completion);
> 
> 		/* Do the actual work in parallel */
> 		retval = p->fn(p->arg);

Duh. The whole reason I copied them was to _not_ do that. That last line 
should obviously be

		retval = fn(arg);

because "p" may gone after we've done the "complete()".

> (And I repeat: the above code is untested, and was written in the email 
> client. It has never seen a compiler, and not gotten a _whole_ lot of 
> thinking).

.. This hasn't changed, I just looked through the code once and found that 
obvious bug.


		Linus
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/