1 files changed, 4 insertions, 4 deletions
diff --git a/buf.h b/buf.h
index ddc42c7..9c586f2 100644
--- a/buf.h
+++ b/buf.h
@@ -5,9 +5,9 @@ struct buf {
   struct buf *prev; // LRU cache list
   struct buf *next;
   struct buf *qnext; // disk queue
-  int done;
   uchar data[512];
 };
-#define B_BUSY 0x1  // buffer is locked by some process
-#define B_VALID 0x2 // buffer contains the data of the sector
-#define B_WRITE 0x4 // asking device driver to write, else read
+#define B_BUSY  0x1  // buffer is locked by some process
+#define B_VALID 0x2  // buffer has been read from disk
+#define B_DIRTY 0x4  // buffer needs to be written to disk
+