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Move retry loop/sleep/wakeup in bio.c into sleeping locks
Diffstat (limited to 'buf.h')
-rw-r--r--buf.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/buf.h b/buf.h
index 0745be5..3266495 100644
--- a/buf.h
+++ b/buf.h
@@ -3,6 +3,7 @@ struct buf {
uint dev;
uint blockno;
struct sleeplock lock;
+ uint refcnt;
struct buf *prev; // LRU cache list
struct buf *next;
struct buf *qnext; // disk queue