diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index d93e071b900c896ff71054817790a36e5c19b987..8ae5dba2d4e5903a163eb4b050aa6da3ea31dc01 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -74,7 +74,7 @@ module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
 struct idmap_hashent {
 	unsigned long		ih_expires;
 	__u32			ih_id;
-	int			ih_namelen;
+	size_t			ih_namelen;
 	char			ih_name[IDMAP_NAMESZ];
 };
 
@@ -193,7 +193,7 @@ idmap_lookup_id(struct idmap_hashtable *h, __u32 id)
  * pretty trivial.
  */
 static inline struct idmap_hashent *
-idmap_alloc_name(struct idmap_hashtable *h, char *name, unsigned len)
+idmap_alloc_name(struct idmap_hashtable *h, char *name, size_t len)
 {
 	return idmap_name_hash(h, name, len);
 }
@@ -381,7 +381,7 @@ idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 	struct idmap_msg im_in, *im = &idmap->idmap_im;
 	struct idmap_hashtable *h;
 	struct idmap_hashent *he = NULL;
-	int namelen_in;
+	size_t namelen_in;
 	int ret;
 
 	if (mlen != sizeof(im_in))