__arch_hweight64
return __arch_hweight64(w);
return __arch_hweight64(w & 0xffff);
return __arch_hweight64(w & 0xff);
unsigned long __arch_hweight64(__u64 w);
unsigned long __arch_hweight64(__u64 w);
#define hweight64(w) (__builtin_constant_p(w) ? __const_hweight64(w) : __arch_hweight64(w))
#define hweight64(w) (__builtin_constant_p(w) ? __const_hweight64(w) : __arch_hweight64(w))