xnu-201.5.tar.gz

[apple/xnu.git] / bsd / sys / buf.h

diff --git a/bsd/sys/buf.h b/bsd/sys/buf.h
index 924ac0fae64a8b2834f28950f200c211ba957eb9..26e5c1139f512af3eb88f0db5ec106290502419a 100644 (file)
--- a/bsd/sys/buf.h
+++ b/bsd/sys/buf.h
@@ -158,7 +158,7 @@ struct buf {
 #define        B_WANTED        0x00800000      /* Process wants this buffer. */
 #define        B_WRITE         0x00000000      /* Write buffer (pseudo flag). */
 #define        B_WRITEINPROG   0x01000000      /* Write in progress. */
-#define        B_UNUSED0       0x02000000      /* Unused bit */
+#define        B_HDRALLOC      0x02000000      /* zone allocated buffer header */
 #define        B_UNUSED1       0x04000000      /* Unused bit */
 #define B_NEED_IODONE   0x08000000
                                                                /* need to do a biodone on the */
@@ -205,13 +205,14 @@ extern struct buf *buf;           /* The buffer headers. */
 /*
  * Definitions for the buffer free lists.
  */
-#define        BQUEUES         5               /* number of free buffer queues */
+#define        BQUEUES         6               /* number of free buffer queues */
 
 #define        BQ_LOCKED       0               /* super-blocks &c */
 #define        BQ_LRU          1               /* lru, useful buffers */
 #define        BQ_AGE          2               /* rubbish */
 #define        BQ_EMPTY        3               /* buffer headers with no memory */
 #define BQ_META                4               /* buffer containing metadata */
+#define BQ_LAUNDRY     5               /* buffers that need cleaning */
 
 __BEGIN_DECLS
 int    allocbuf __P((struct buf *, int));