Hi Paolo,

Thank you for the patch! Yet something to improve:

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

url:    https://github.com/0day-ci/linux/commits/Paolo-Abeni/net-mitigate-retpoline-overhead/20181206-183400
config: i386-allmodconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   net/ipv6/ip6_offload.o: In function `ipv6_gro_receive':
>> ip6_offload.c:(.text+0x58e): undefined reference to `transport6_gro_receive1'
   ip6_offload.c:(.text+0x595): undefined reference to `transport6_gro_receive1'
   net/ipv6/ip6_offload.o: In function `ipv6_gro_complete':
>> ip6_offload.c:(.text+0xb26): undefined reference to `transport6_gro_complete1'
   ip6_offload.c:(.text+0xb30): undefined reference to `transport6_gro_complete1'

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