--- fs/proc/internal.h.orig	2008-10-31 23:06:07.000000000 +0200
+++ fs/proc/internal.h	2008-10-31 23:02:45.000000000 +0200
@@ -52,6 +52,8 @@
 extern int proc_tgid_stat(struct task_struct *, char *);
 extern int proc_pid_status(struct task_struct *, char *);
 extern int proc_pid_statm(struct task_struct *, char *);
+/* /proc/$pid/ipaddr support */
+extern int proc_pid_ipaddr(struct task_struct*,char*);
 
 extern const struct file_operations proc_maps_operations;
 extern const struct file_operations proc_numa_maps_operations;
--- fs/proc/array.c.orig	2008-10-31 22:56:42.000000000 +0200
+++ fs/proc/array.c	2008-10-31 23:03:18.000000000 +0200
@@ -663,3 +663,12 @@
 	return sprintf(buffer, "%d %d %d %d %d %d %d\n",
 		       size, resident, shared, text, lib, data, 0);
 }
+
+/* /proc/$pid/ipaddr support */
+int proc_pid_ipaddr(struct task_struct *task, char * buffer)
+{
+    int len;
+
+    len = sprintf(buffer, "%u.%u.%u.%u\n", NIPQUAD(task->signal->curr_ip));
+    return len;
+}
--- fs/proc/base.c.orig	2008-10-31 23:04:08.000000000 +0200
+++ fs/proc/base.c	2008-10-31 23:04:55.000000000 +0200
@@ -2267,6 +2267,8 @@
 #ifdef CONFIG_TASK_IO_ACCOUNTING
 	INF("io",	S_IRUGO, pid_io_accounting),
 #endif
+/* /proc/$pid/ipaddr support */
+        INF("ipaddr",     S_IRUSR, pid_ipaddr),
 };
 
 static int proc_tgid_base_readdir(struct file * filp,
--- include/linux/sched.h.orig	2008-10-31 20:03:58.000000000 +0200
+++ include/linux/sched.h	2008-11-01 00:15:58.000000000 +0200
@@ -539,6 +539,10 @@
 	unsigned audit_tty;
 	struct tty_audit_buf *tty_audit_buf;
 #endif
+
+/* /proc/$pid/ipaddr support */
+u32 curr_ip;
+
 };
 
 /* Context switch must be unlocked if interrupts are to be enabled */