main_tb 264 include/net/ip_fib.h struct fib_table *fib_trie_unmerge(struct fib_table *main_tb); main_tb 2660 net/ipv4/fib_trie.c struct fib_table *main_tb; main_tb 2713 net/ipv4/fib_trie.c iter->main_tb = tb; main_tb 2781 net/ipv4/fib_trie.c struct fib_table *tb = iter->main_tb;