On Sat, Nov 05, 2005 at 02:51:34PM +0000, Al Viro wrote:
> On Sat, Nov 05, 2005 at 10:10:27AM +0000, Russell King wrote:
> > It's probably better to use a union with these, eg:
> >
> > union {
> > void __user *arg;
> > struct watchdog_info __user *info;
> > int __user *i;
> > } u;
> >
> > u.arg = (void __user *)arg;
> >
> > ...
> >
> > ret = copy_to_user(u.info, &ident, sizeof(ident)) ? -EFAULT : 0;
>
> Just use void __user *.
That works for copy_to_user, but not for put_user() where the type of
the pointer matters.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
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