netpoll: add IPv6 support

v5: move some ipv6 checksum functions into net/ipv6/ip6_checksum.c

v4: remove ndisc_parse_options(), ignore ICMP options there
    make udp6_csum_init() inline so that we don't rely on IPV6=y
    fix a conflict with Jiri's patchset

v3: fix CONFIG_IPV6=m case
 
v2: use bool for ipv6 flag
    fix !CONFIG_IPV6 case

This patchset implements netpoll over IPv6.

Cong Wang (4):
  netpoll: prepare for ipv6
  ipv6: move csum_ipv6_magic() and udp6_csum_init() into static library
  netpoll: add IPv6 support
  netconsole: add IPv6 example in doc

 Documentation/networking/netconsole.txt |    7 +-
 drivers/net/netconsole.c                |   44 ++-
 include/linux/netpoll.h                 |   13 +-
 include/net/ip6_checksum.h              |   62 +---
 net/core/netpoll.c                      |  622 ++++++++++++++++++++++---------
 net/ipv6/Makefile                       |    2 +-
 net/ipv6/ip6_checksum.c                 |   97 +++++
 net/ipv6/udp.c                          |   34 --
 8 files changed, 607 insertions(+), 274 deletions(-)

-- 
1.7.7.6