From: Kees Cook
> Sent: 22 March 2018 15:01
...
> > /* Glory to Martin Uecker <Martin.Uecker@xxxxxxxxxxxxxxxxxxxxx> */
> > #define __is_constant(a) \
> > (sizeof(int) == sizeof(*(1 ? ((void*)((a) * 0l)) : (int*)1)))
...
> So, this time it's not a catastrophic failure with gcc 4.4. Instead it
> fails in 11 distinct places:
...
> Seems like it doesn't like void * arguments:
>
> mm/percpu.c:
> void *ptr;
> ...
> base = min(ptr, base);
Try adding (unsigned long) before the (a).
David
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