fs: nfs: add missing MODULE_DESCRIPTION() macros

Fix the 'make W=1' warnings:
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nfs_common/nfs_acl.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nfs_common/grace.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nfs/nfs.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nfs/nfsv2.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nfs/nfsv3.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nfs/nfsv4.o

Signed-off-by: Jeff Johnson <[email protected]>
Reviewed-by: Jeff Layton <[email protected]>
Signed-off-by: Anna Schumaker <[email protected]>
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 6d185af..d81c5bcc 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -2539,6 +2539,7 @@ static void __exit exit_nfs_fs(void)
 
 /* Not quite true; I just maintain it */
 MODULE_AUTHOR("Olaf Kirch <[email protected]>");
+MODULE_DESCRIPTION("NFS client support");
 MODULE_LICENSE("GPL");
 module_param(enable_ino64, bool, 0644);
 
diff --git a/fs/nfs/nfs2super.c b/fs/nfs/nfs2super.c
index 467f21e..b1badc7 100644
--- a/fs/nfs/nfs2super.c
+++ b/fs/nfs/nfs2super.c
@@ -26,6 +26,7 @@ static void __exit exit_nfs_v2(void)
 	unregister_nfs_version(&nfs_v2);
 }
 
+MODULE_DESCRIPTION("NFSv2 client support");
 MODULE_LICENSE("GPL");
 
 module_init(init_nfs_v2);
diff --git a/fs/nfs/nfs3super.c b/fs/nfs/nfs3super.c
index 8a9be9e..20a8047 100644
--- a/fs/nfs/nfs3super.c
+++ b/fs/nfs/nfs3super.c
@@ -27,6 +27,7 @@ static void __exit exit_nfs_v3(void)
 	unregister_nfs_version(&nfs_v3);
 }
 
+MODULE_DESCRIPTION("NFSv3 client support");
 MODULE_LICENSE("GPL");
 
 module_init(init_nfs_v3);
diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index 8da5a9c..b29a26923 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -332,6 +332,7 @@ static void __exit exit_nfs_v4(void)
 	nfs_dns_resolver_destroy();
 }
 
+MODULE_DESCRIPTION("NFSv4 client support");
 MODULE_LICENSE("GPL");
 
 module_init(init_nfs_v4);
diff --git a/fs/nfs_common/grace.c b/fs/nfs_common/grace.c
index 1479583..27cd0d13 100644
--- a/fs/nfs_common/grace.c
+++ b/fs/nfs_common/grace.c
@@ -139,6 +139,7 @@ exit_grace(void)
 }
 
 MODULE_AUTHOR("Jeff Layton <[email protected]>");
+MODULE_DESCRIPTION("NFS client and server infrastructure");
 MODULE_LICENSE("GPL");
 module_init(init_grace)
 module_exit(exit_grace)
diff --git a/fs/nfs_common/nfsacl.c b/fs/nfs_common/nfsacl.c
index 5a5bd85..ea382b7 100644
--- a/fs/nfs_common/nfsacl.c
+++ b/fs/nfs_common/nfsacl.c
@@ -29,6 +29,7 @@
 #include <linux/nfs3.h>
 #include <linux/sort.h>
 
+MODULE_DESCRIPTION("NFS ACL support");
 MODULE_LICENSE("GPL");
 
 struct nfsacl_encode_desc {