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SubjectRe: [PATCH net-next 2/2] tuntap: XDP transmission
Hi Jason,

I love your patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url: https://github.com/0day-ci/linux/commits/Jason-Wang/XDP-transmission-for-tuntap/20180101-105946
config: i386-randconfig-x072-201800 (attached as .config)
compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All warnings (new ones prefixed by >>):

drivers//net/tun.c: In function 'tun_xdp_to_ptr':
>> drivers//net/tun.c:251:9: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
return (void *)((unsigned long)ptr | TUN_XDP_FLAG);
^
drivers//net/tun.c: In function 'tun_ptr_to_xdp':
drivers//net/tun.c:257:9: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
return (void *)((unsigned long)ptr & ~TUN_XDP_FLAG);
^

vim +251 drivers//net/tun.c

248
249 void *tun_xdp_to_ptr(void *ptr)
250 {
> 251 return (void *)((unsigned long)ptr | TUN_XDP_FLAG);
252 }
253 EXPORT_SYMBOL(tun_xdp_to_ptr);
254

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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