Re: [PATCH] kernel/param.c: don't use .max when .num is NULL in param_array_set()

[Rusty Russell <rusty@rustcorp.com.au>]

On Sun, 2005-03-27 at 14:57 +0200, Bert Wesarg wrote:
> Hello,
> 
> there seems to be a bug, at least for me, in kernel/param.c for arrays
> with .num == NULL. If .num == NULL, the function param_array_set() uses
> &.max for the call to param_array(), wich alters the .max value to the
> number of arguments. The result is, you can't set more array arguments as
> the last time you set the parameter.

Yes.  But this ignores the larger problem, in that the printing routines
need *some* way of telling how many to print.  We could add a new
element for this case, at the price of enlarging the structure a little
for every array parameter.  I think you'll find that with your patch,
the code does this:

	$ insmod example.ko array=1,2,3
	$ cat /sys/module/example/parameters/array
	1,2,3,0,0,0,0,0,0,0

Cheers,
Rusty.
-- 
A bad analogy is like a leaky screwdriver -- Richard Braakman