[PATCH 4/9] netfilter: h323: eliminate anonymous module_init & module_exit

Randy Dunlap
2022-03-16T19:20:40Z

Eliminate anonymous module_init() and module_exit(), which can lead to
confusion or ambiguity when reading System.map, crashes/oops/bugs,
or an initcall_debug log.

Give each of these init and exit functions unique driver-specific
names to eliminate the anonymous names.

Example 1: (System.map)
ffffffff832fc78c t init
ffffffff832fc79e t init
ffffffff832fc8f8 t init

Example 2: (initcall_debug log)
calling init+0x0/0x12 @ 1
initcall init+0x0/0x12 returned 0 after 15 usecs
calling init+0x0/0x60 @ 1
initcall init+0x0/0x60 returned 0 after 2 usecs
calling init+0x0/0x9a @ 1
initcall init+0x0/0x9a returned 0 after 74 usecs

Fixes: f587de0e2feb ("[NETFILTER]: nf_conntrack/nf_nat: add H.323 helper port")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Jozsef Kadlecsik <kadlec@netfilter.org>
Cc: Florian Westphal <fw@strlen.de>
Cc: netfilter-devel@vger.kernel.org
Cc: coreteam@netfilter.org
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org
---
net/ipv4/netfilter/nf_nat_h323.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

--- lnx-517-rc8.orig/net/ipv4/netfilter/nf_nat_h323.c
+++ lnx-517-rc8/net/ipv4/netfilter/nf_nat_h323.c
@@ -580,7 +580,7 @@ static struct nf_ct_helper_expectfn call
};

/****************************************************************************/
-static int __init init(void)
+static int __init nf_nat_h323_init(void)
{
BUG_ON(set_h245_addr_hook != NULL);
BUG_ON(set_h225_addr_hook != NULL);
@@ -607,7 +607,7 @@ static int __init init(void)
}

/****************************************************************************/
-static void __exit fini(void)
+static void __exit nf_nat_h323_fini(void)
{
RCU_INIT_POINTER(set_h245_addr_hook, NULL);
RCU_INIT_POINTER(set_h225_addr_hook, NULL);
@@ -624,8 +624,8 @@ static void __exit fini(void)
}

/****************************************************************************/
-module_init(init);
-module_exit(fini);
+module_init(nf_nat_h323_init);
+module_exit(nf_nat_h323_fini);

MODULE_AUTHOR("Jing Min Zhao <zhaojingmin@users.sourceforge.net>");
MODULE_DESCRIPTION("H.323 NAT helper");