Correctly read ext2 superblock.

mentos/src/kernel.c

@@ -20,6 +20,7 @@
 #include "io/debug.h"
 #include "drivers/fdc.h"
 #include "fs/initrd.h"
+#include "fs/ext2.h"
 #include "klib/irqflags.h"
 #include "drivers/keyboard/keyboard.h"
 #include "process/scheduler.h"
@@ -268,6 +269,11 @@ int kmain(boot_info_t *boot_informations)
         return 1;
     }
 
+    ext2_initialize();
+    if (do_mount("ext2", "/mnt", "/dev/hda")) {
+        pr_warning("Failed to mount ext at `/dev/hda`!\n");
+    }
+
     //==========================================================================
     pr_notice("Setting up keyboard driver...\n");
     printf("Setting up keyboard driver...");