Thank you for your replies and reviews.

I will follow your advices.

quoted

 static LIST_HEAD(target_list);
 
 static DEFINE_SPINLOCK(target_list_lock);
 
+static ssize_t show_local_ip(struct netconsole_target *nt, char *buf)
+{
+	return sprintf(buf, "%d.%d.%d.%d\n", HIPQUAD(nt->np.local_ip));

I don't understand the use of HIPQUAD() here instead of
NIPQUAD().  Explain?

Also, NIPQUAD_FMT (in kernel.h) uses "%u.%u.%u.%u".
This should probably be the same.
Or just use:	NIPQUAD_FMT "\n"

IP address is stored in the form of host byte order in netpoll structure.
So, You can't use NIPQUAD to follow the current implementation of netpoll.

-- 
Keiichi KII
NEC Corporation OSS Promotion Center
E-mail: k-keiichi@bx.jp.nec.com