[rcu:dev.2019.07.31a 110/123] kernel/rcu/rcu_segcblist.c:61:6: sparse: sparse: symbol 'rcu_segcblist_set_len' was not declared. Should it be static?

[kbuild test robot]

tree:   https://kernel.googlesource.com/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2019.07.31a
head:   71cf692f482ff45802352cf85a8880035fca9e52
commit: ab2ef5c7b4d1933ee53a66d981cb67974de46815 [110/123] rcu/nocb: Atomic ->len field in rcu_segcblist structure
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-rc1-7-g2b96cd8-dirty
        git checkout ab2ef5c7b4d1933ee53a66d981cb67974de46815
        make ARCH=x86_64 allmodconfig
        make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>


sparse warnings: (new ones prefixed by >>)

   kernel/rcu/rcu_segcblist.c:32:6: sparse: sparse: symbol 'rcu_cblist_enqueue' was not declared. Should it be static?
>> kernel/rcu/rcu_segcblist.c:61:6: sparse: sparse: symbol 'rcu_segcblist_set_len' was not declared. Should it be static?
>> kernel/rcu/rcu_segcblist.c:77:6: sparse: sparse: symbol 'rcu_segcblist_add_len' was not declared. Should it be static?
   kernel/rcu/rcu_segcblist.c:96:6: sparse: sparse: symbol 'rcu_segcblist_inc_len' was not declared. Should it be static?
>> kernel/rcu/rcu_segcblist.c:107:6: sparse: sparse: symbol 'rcu_segcblist_xchg_len' was not declared. Should it be static?

Please review and possibly fold the followup patch.

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