ext4: change s_mount_opt to be an unsigned int

We can only fit 32 options in s_mount_opt because an unsigned long is
32-bits on a x86 machine.  So use an unsigned int to save space on
64-bit platforms.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index e8f0b2a..4c364ae 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1655,7 +1655,7 @@
 	ext4_commit_super(sb, 1);
 	if (test_opt(sb, DEBUG))
 		printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, "
-				"bpg=%lu, ipg=%lu, mo=%04lx]\n",
+				"bpg=%lu, ipg=%lu, mo=%04x]\n",
 			sb->s_blocksize,
 			sbi->s_groups_count,
 			EXT4_BLOCKS_PER_GROUP(sb),