disable MADV_FREE usage in mallocng

[musl] / arch / m68k / atomic_arch.h

#define a_cas a_cas
static inline int a_cas(volatile int *p, int t, int s)
{
        __asm__ __volatile__ (
                "cas.l %0, %2, (%1)"
                : "+d"(t) : "a"(p), "d"(s) : "memory", "cc");
        return t;
}