[ICMP]: Add return code to icmp_init.

icmp_init could fail and this is normal for namespace other than initial.
So, the panic should be triggered only on init_net initialization path.

Additionally create rollback path for icmp_init as a separate function.
It will also be used later during namespace destruction.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/net/icmp.h b/include/net/icmp.h
index 7bf714d9d7c7..faba64db8ff0 100644
--- a/include/net/icmp.h
+++ b/include/net/icmp.h
@@ -48,7 +48,7 @@ struct sk_buff;
 extern void     icmp_send(struct sk_buff *skb_in,  int type, int code, __be32 info);
 extern int      icmp_rcv(struct sk_buff *skb);
 extern int      icmp_ioctl(struct sock *sk, int cmd, unsigned long arg);
-extern void     icmp_init(void);
+extern int      icmp_init(void);
 extern void     icmp_out_count(unsigned char type);
 
 /* Move into dst.h ? */