Many changes were made during development that could result in old
versions of mklogfs and the kernel code being subtly incompatible.
Not being a friend of subtleties, I hereby change the magic number.
Any old version of mklogfs is now guaranteed to fail.
/* Magic numbers. 64bit for superblock, 32bit for statfs f_type */
-#define LOGFS_MAGIC 0xb21f205ac97e8168ull
+#define LOGFS_MAGIC 0x7a3a8e5cb9d5bf67ull
#define LOGFS_MAGIC_U32 0xc97e8168u
/*