fs: Limit sys_mount to only request filesystem modules. (Part 3)

Somehow I failed to add the MODULE_ALIAS_FS for cifs, hostfs, hpfs,
squashfs, and udf despite what I thought were my careful checks :(

Add them now.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

fs/cifs/cifsfs.c

@@ -777,6 +777,7 @@ struct file_system_type cifs_fs_type = {
 	.kill_sb = cifs_kill_sb,
 	/*  .fs_flags */
 };
+MODULE_ALIAS_FS("cifs");
 const struct inode_operations cifs_dir_inode_ops = {
 	.create = cifs_create,
 	.atomic_open = cifs_atomic_open,

fs/hostfs/hostfs_kern.c

@@ -993,6 +993,7 @@ static struct file_system_type hostfs_type = {
 	.kill_sb	= hostfs_kill_sb,
 	.fs_flags 	= 0,
 };
+MODULE_ALIAS_FS("hostfs");
 
 static int __init init_hostfs(void)
 {

fs/hpfs/super.c

@@ -688,6 +688,7 @@ static struct file_system_type hpfs_fs_type = {
 	.kill_sb	= kill_block_super,
 	.fs_flags	= FS_REQUIRES_DEV,
 };
+MODULE_ALIAS_FS("hpfs");
 
 static int __init init_hpfs_fs(void)
 {

fs/squashfs/super.c

@@ -489,6 +489,7 @@ static struct file_system_type squashfs_fs_type = {
 	.kill_sb = kill_block_super,
 	.fs_flags = FS_REQUIRES_DEV
 };
+MODULE_ALIAS_FS("squashfs");
 
 static const struct super_operations squashfs_super_ops = {
 	.alloc_inode = squashfs_alloc_inode,

fs/udf/super.c

@@ -118,6 +118,7 @@ static struct file_system_type udf_fstype = {
 	.kill_sb	= kill_block_super,
 	.fs_flags	= FS_REQUIRES_DEV,
 };
+MODULE_ALIAS_FS("udf");
 
 static struct kmem_cache *udf_inode_cachep;