diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c
index dbbefbc..1adcf93 100644
--- a/fs/lockd/svcsubs.c
+++ b/fs/lockd/svcsubs.c
@@ -18,6 +18,8 @@
 #include <linux/lockd/lockd.h>
 #include <linux/lockd/share.h>
 #include <linux/lockd/sm_inter.h>
+#include <linux/module.h>
+#include <linux/mount.h>
 
 #define NLMDBG_FACILITY		NLMDBG_SVCSUBS
 
@@ -230,7 +232,7 @@
  * Loop over all files in the file table.
  */
 static int
-nlm_traverse_files(struct nlm_host *host, nlm_host_match_fn_t match)
+nlm_traverse_files(void *data, nlm_host_match_fn_t match)
 {
 	struct hlist_node *pos, *next;
 	struct nlm_file	*file;
@@ -244,7 +246,7 @@
 
 			/* Traverse locks, blocks and shares of this file
 			 * and update file->f_locks count */
-			if (nlm_inspect_file(host, file, match))
+			if (nlm_inspect_file(data, file, match))
 				ret = 1;
 
 			mutex_lock(&nlm_file_mutex);
@@ -303,21 +305,27 @@
  *	Used by nlmsvc_invalidate_all
  */
 static int
-nlmsvc_mark_host(struct nlm_host *host, struct nlm_host *dummy)
+nlmsvc_mark_host(void *data, struct nlm_host *dummy)
 {
+	struct nlm_host *host = data;
+
 	host->h_inuse = 1;
 	return 0;
 }
 
 static int
-nlmsvc_same_host(struct nlm_host *host, struct nlm_host *other)
+nlmsvc_same_host(void *data, struct nlm_host *other)
 {
+	struct nlm_host *host = data;
+
 	return host == other;
 }
 
 static int
-nlmsvc_is_client(struct nlm_host *host, struct nlm_host *dummy)
+nlmsvc_is_client(void *data, struct nlm_host *dummy)
 {
+	struct nlm_host *host = data;
+
 	if (host->h_server) {
 		/* we are destroying locks even though the client
 		 * hasn't asked us too, so don't unmonitor the
@@ -370,3 +378,21 @@
 	 */
 	nlm_traverse_files(NULL, nlmsvc_is_client);
 }
+
+static int
+nlmsvc_match_ip(void *datap, struct nlm_host *host)
+{
+	__be32 *server_addr = datap;
+
+	return host->h_saddr.sin_addr.s_addr == *server_addr;
+}
+
+int
+nlmsvc_unlock_all_by_ip(__be32 server_addr)
+{
+	int ret;
+	ret = nlm_traverse_files(&server_addr, nlmsvc_match_ip);
+	return ret ? -EIO : 0;
+
+}
+EXPORT_SYMBOL_GPL(nlmsvc_unlock_all_by_ip);