some comment changes

1 files changed, 2 insertions, 2 deletions

diff --git a/buf.h b/buf.h
index a2a3ec1..ccf7f8b 100644
--- a/buf.h
+++ b/buf.h
@@ -6,5 +6,5 @@ struct buf {
   struct buf *next;
   uchar data[512];
 };
-#define B_BUSY 0x1
-#define B_VALID 0x2
+#define B_BUSY 0x1  // buffer is locked by some process
+#define B_VALID 0x2 // buffer contains the data of the sector