+ /*
+ * We need to make sure the BH_Delay flag is passed down to
+ * ext4_da_get_block_write(), since it calls
+ * ext4_get_blocks_wrap() with the EXT4_DELALLOC_RSVED flag.
+ * This flag causes ext4_get_blocks_wrap() to call
+ * ext4_da_update_reserve_space() if the passed buffer head
+ * has the BH_Delay flag set. In the future, once we clean up
+ * the interfaces to ext4_get_blocks_wrap(), we should pass in
+ * a separate flag which requests that the delayed allocation
+ * statistics should be updated, instead of depending on the
+ * state information getting passed down via the map_bh's
+ * state bitmasks plus the magic EXT4_DELALLOC_RSVED flag.
+ */
+ new.b_state = mpd->b_state & (1 << BH_Delay);