diff -urNp ref/include/linux/sched.h 2.4.20pre5aa2/include/linux/sched.h
--- ref/include/linux/sched.h	Fri Sep  6 01:14:12 2002
+++ 2.4.20pre5aa2/include/linux/sched.h	Fri Sep  6 01:14:28 2002
@@ -459,6 +459,7 @@ struct task_struct {
 #define PF_ATOMICALLOC	(1UL<<7)	/* do not block during memalloc */
 #define PF_FREE_PAGES	(1UL<<8)	/* per process page freeing */
 #define PF_NOIO		(1UL<<9)	/* avoid generating further I/O */
+#define PF_FSTRANS	(1UL<<10)	/* inside a filesystem transaction */
 
 /*
  * Ptrace flags