netfilter: nf_conntrack: use this_cpu_inc()
netfilter: nf_conntrack: use this_cpu_inc()

this_cpu_inc() is IRQ safe and faster than
local_bh_disable()/__this_cpu_inc()/local_bh_enable(), at least on x86.

Signed-off-by: Eric Dumazet <312c7d941f03386814be517ffdb3e0eb6624e275@google.com>
Cc: Patrick McHardy <3a4d625ce225e891399f98db96a382ac4a84080b@trash.net>
Cc: Christoph Lameter <ef3ecccf258fa062c5c6521a4887d40541963af7@linux.com>
Cc: Tejun Heo <546b05909706652891a87f7bfe385ae147f61f91@kernel.org>
Reviewed-by: Christoph Lameter <ef3ecccf258fa062c5c6521a4887d40541963af7@linux.com>
Signed-off-by: Pablo Neira Ayuso <707d14912bb250caf67dfe0ea4035681fbfc4f56@netfilter.org>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas