Merge branch 'sysctl-less-storage'

Eric Dumazet says:

====================
net: use less storage for most sysctl

This patch series adds a new sysctl type, to allow using u8 instead of
"int" or "long int" types.

Then we convert mosts sysctls found in struct netns_ipv4
to shrink it by three cache lines.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>