diff --git a/include/linux/msg.h b/include/linux/msg.h
index 391af8d11cce..e21f9d44307f 100644
--- a/include/linux/msg.h
+++ b/include/linux/msg.h
@@ -6,9 +6,9 @@
 
 /* one msg_msg structure for each message */
 struct msg_msg {
-	struct list_head m_list; 
-	long  m_type;          
-	int m_ts;           /* message text size */
+	struct list_head m_list;
+	long m_type;
+	size_t m_ts;		/* message text size */
 	struct msg_msgseg* next;
 	void *security;
 	/* the actual message follows immediately */
diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index 491e71f2a1b8..7e7095974d54 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -41,15 +41,15 @@ struct msg_msgseg {
 	/* the next part of the message follows immediately */
 };
 
-#define DATALEN_MSG	(int)(PAGE_SIZE-sizeof(struct msg_msg))
-#define DATALEN_SEG	(int)(PAGE_SIZE-sizeof(struct msg_msgseg))
+#define DATALEN_MSG	((size_t)PAGE_SIZE-sizeof(struct msg_msg))
+#define DATALEN_SEG	((size_t)PAGE_SIZE-sizeof(struct msg_msgseg))
 
 
-static struct msg_msg *alloc_msg(int len)
+static struct msg_msg *alloc_msg(size_t len)
 {
 	struct msg_msg *msg;
 	struct msg_msgseg **pseg;
-	int alen;
+	size_t alen;
 
 	alen = min(len, DATALEN_MSG);
 	msg = kmalloc(sizeof(*msg) + alen, GFP_KERNEL);
@@ -80,12 +80,12 @@ out_err:
 	return NULL;
 }
 
-struct msg_msg *load_msg(const void __user *src, int len)
+struct msg_msg *load_msg(const void __user *src, size_t len)
 {
 	struct msg_msg *msg;
 	struct msg_msgseg *seg;
 	int err = -EFAULT;
-	int alen;
+	size_t alen;
 
 	msg = alloc_msg(len);
 	if (msg == NULL)
@@ -117,8 +117,8 @@ out_err:
 struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst)
 {
 	struct msg_msgseg *dst_pseg, *src_pseg;
-	int len = src->m_ts;
-	int alen;
+	size_t len = src->m_ts;
+	size_t alen;
 
 	BUG_ON(dst == NULL);
 	if (src->m_ts > dst->m_ts)
@@ -147,9 +147,9 @@ struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst)
 	return ERR_PTR(-ENOSYS);
 }
 #endif
-int store_msg(void __user *dest, struct msg_msg *msg, int len)
+int store_msg(void __user *dest, struct msg_msg *msg, size_t len)
 {
-	int alen;
+	size_t alen;
 	struct msg_msgseg *seg;
 
 	alen = min(len, DATALEN_MSG);
diff --git a/ipc/util.h b/ipc/util.h
index f2f5036f2eed..59d78aa94987 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -148,9 +148,9 @@ int ipc_parse_version (int *cmd);
 #endif
 
 extern void free_msg(struct msg_msg *msg);
-extern struct msg_msg *load_msg(const void __user *src, int len);
+extern struct msg_msg *load_msg(const void __user *src, size_t len);
 extern struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst);
-extern int store_msg(void __user *dest, struct msg_msg *msg, int len);
+extern int store_msg(void __user *dest, struct msg_msg *msg, size_t len);
 
 extern void recompute_msgmni(struct ipc_namespace *);