Index: uspace/app/mkexfat/mkexfat.c
===================================================================
--- uspace/app/mkexfat/mkexfat.c	(revision ba55c1949eefb8c2f35d0a73f57415730ce5c48b)
+++ uspace/app/mkexfat/mkexfat.c	(revision 392bd67c1151f1a025981c245cc77581ebdc228b)
@@ -569,4 +569,23 @@
 }
 
+/** Compute the checksum of the upcase table.
+ *
+ * @param data   Pointer to the upcase table.
+ * @param nbytes size of the upcase table in bytes.
+ * @return   Checksum value.
+ */
+static uint32_t
+upcase_table_checksum(void const *data, size_t nbytes)
+{
+	size_t index;
+	uint32_t chksum = 0;
+	uint8_t const *octets = (uint8_t *) data;
+
+	for (index = 0; index < nbytes; ++index)
+		chksum = ((chksum << 31) | (chksum >> 1)) + octets[index];
+
+	return chksum;
+}
+
 int main (int argc, char **argv)
 {