Compiler warning - ipv4 fib_trie

[Koen Vandeputte]

Hi All,

During compilation of kernel 4.14.96 and 5.0-rc5 I'm seeing following 
warning:

net/ipv4/fib_trie.c: In function 'fib_trie_unmerge':
net/ipv4/fib_trie.c:1749:8: warning: 'local_tp' may be used 
uninitialized in this function [-Wmaybe-uninitialized]
    if (fib_insert_alias(lt, local_tp, local_l, new_fa,
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           NULL, l->key)) {
           ~~~~~~~~~~~~~

Code:

https://elixir.bootlin.com/linux/v5.0-rc5/source/net/ipv4/fib_trie.c#L1731

Looks like 'local_tp' should be NULL-ified


Thanks,

Koen