#define BTRFS_ORDERED_COMPRESSED 3 /* writing a zlib compressed extent */
-#define BTRFS_ORDERED_PREALLOC 4 /* set when writing to prealloced extent */
+#define BTRFS_ORDERED_PREALLOC 4 /* set when writing to preallocated extent */
#define BTRFS_ORDERED_DIRECT 5 /* set when we're doing DIO with this extent */