--- /sys/src/9/bcm/dat.h
+++ /sys/src/9/bcm/dat.h
@@ -22,7 +22,6 @@ typedef struct Lock	Lock;
 typedef struct Memcache	Memcache;
 typedef struct MMMU	MMMU;
 typedef struct Mach	Mach;
-typedef struct Notsave	Notsave;
 typedef struct Page	Page;
 typedef struct PhysUart	PhysUart;
 typedef struct PMMU	PMMU;
@@ -141,15 +140,6 @@ enum {
 	Alt5	= 0x2,
 };
 
-
-
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave {
-	int	emptiness;
-};
-
 /*
  *  MMU stuff in Mach.
  */
--- /sys/src/9/kw/dat.h
+++ /sys/src/9/kw/dat.h
@@ -7,7 +7,6 @@ typedef struct Lock	Lock;
 typedef struct Memcache	Memcache;
 typedef struct MMMU	MMMU;
 typedef struct Mach	Mach;
-typedef struct Notsave	Notsave;
 typedef struct Page	Page;
 typedef struct Pcidev	Pcidev;
 typedef struct PhysUart	PhysUart;
@@ -97,13 +96,6 @@ struct Conf
 //	ulong	mhz;
 };
 
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave {
-	int	emptiness;
-};
-
 /*
  *  MMU stuff in Mach.
  */
--- /sys/src/9/loongson/dat.h
+++ /sys/src/9/loongson/dat.h
@@ -9,7 +9,6 @@ typedef struct Label	Label;
 typedef struct Lock	Lock;
 typedef struct Mach	Mach;
 typedef struct MMU	MMU;
-typedef struct Notsave	Notsave;
 typedef struct Pcidev	Pcidev;
 typedef struct PMMU	PMMU;
 typedef struct Softtlb	Softtlb;
@@ -122,14 +121,6 @@ struct PMMU
 	int	pidonmach[MAXMACH];
 };
 
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave
-{
-	ulong	nonempty;
-};
-
 #include "../port/portdat.h"
 
 /* First FIVE members' offsets known by l.s */
--- /sys/src/9/loongson64/dat.h
+++ /sys/src/9/loongson64/dat.h
@@ -9,7 +9,6 @@ typedef struct Label	Label;
 typedef struct Lock	Lock;
 typedef struct Mach	Mach;
 typedef struct MMU	MMU;
-typedef struct Notsave	Notsave;
 typedef struct Pcidev	Pcidev;
 typedef struct PMMU	PMMU;
 typedef struct Softtlb	Softtlb;
@@ -122,14 +121,6 @@ struct PMMU
 	int	pidonmach[MAXMACH];
 };
 
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave
-{
-	ulong	nonempty;
-};
-
 #include "../port/portdat.h"
 
 /* First FIVE members' offsets known by l.s */
--- /sys/src/9/mtx/dat.h
+++ /sys/src/9/mtx/dat.h
@@ -5,7 +5,6 @@ typedef struct ISAConf	ISAConf;
 typedef struct Label	Label;
 typedef struct Lock	Lock;
 typedef struct Mach	Mach;
-typedef struct Notsave	Notsave;
 typedef struct Page	Page;
 typedef struct PCArch	PCArch;
 typedef struct Pcidev	Pcidev;
@@ -106,14 +105,6 @@ struct PMMU
 	int	mmupid;
 };
 
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave
-{
-	ulong	UNUSED;
-};
-
 #include "../port/portdat.h"
 
 /*
--- /sys/src/9/omap/dat.h
+++ /sys/src/9/omap/dat.h
@@ -34,7 +34,6 @@ typedef struct Memcache	Memcache;
 typedef struct MMMU	MMMU;
 typedef struct Mach	Mach;
 typedef u32int Mreg;				/* Msr - bloody UART */
-typedef struct Notsave	Notsave;
 typedef struct Page	Page;
 typedef struct PhysUart	PhysUart;
 typedef struct PMMU	PMMU;
@@ -121,13 +120,6 @@ struct Conf
 	int	monitor;	/* flag */
 };
 
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave {
-	int	emptiness;
-};
-
 /*
  *  MMU stuff in Mach.
  */
--- /sys/src/9/pc/dat.h
+++ /sys/src/9/pc/dat.h
@@ -10,7 +10,6 @@ typedef struct Label	Label;
 typedef struct Lock	Lock;
 typedef struct MMU	MMU;
 typedef struct Mach	Mach;
-typedef struct Notsave	Notsave;
 typedef struct PCArch	PCArch;
 typedef struct Pcidev	Pcidev;
 typedef struct PCMmap	PCMmap;
@@ -161,16 +160,6 @@ struct PMMU
 	int	nkmap;			/* number of current kmaps */
 };
 
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave
-{
-	ulong	svflags;
-	ulong	svcs;
-	ulong	svss;
-};
-
 #include "../port/portdat.h"
 
 typedef struct {
--- /sys/src/9/pcboot/dat.h
+++ /sys/src/9/pcboot/dat.h
@@ -8,7 +8,6 @@ typedef struct Label	Label;
 typedef struct Lock	Lock;
 typedef struct MMU	MMU;
 typedef struct Mach	Mach;
-typedef struct Notsave	Notsave;
 typedef struct PCArch	PCArch;
 typedef struct Pcidev	Pcidev;
 typedef struct PCMmap	PCMmap;
@@ -162,16 +161,6 @@ struct PMMU
 	int	nkmap;			/* number of current kmaps */
 };
 
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave
-{
-	ulong	svflags;
-	ulong	svcs;
-	ulong	svss;
-};
-
 #include "../port/portdat.h"
 
 typedef struct {
--- /sys/src/9/port/portdat.h
+++ /sys/src/9/port/portdat.h
@@ -782,7 +782,7 @@ struct Proc
 
 	void	*ureg;		/* User registers for notes */
 	void	*dbgreg;	/* User registers for devproc */
-	Notsave;
+/*	Notsave;		/* not used since 1st ed.; now use ureg above */
 
 	/*
 	 *  machine specific MMU
--- /sys/src/9/ppc/dat.h
+++ /sys/src/9/ppc/dat.h
@@ -6,7 +6,6 @@ typedef struct Imap	Imap;
 typedef struct Label	Label;
 typedef struct Lock	Lock;
 typedef struct Mach	Mach;
-typedef struct Notsave	Notsave;
 typedef struct PCArch	PCArch;
 typedef struct PMMU	PMMU;
 typedef struct Page	Page;
@@ -115,14 +114,6 @@ struct PMMU
 	Ureg	*mmureg;		/* pointer to ureg structure */
 };
 
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave
-{
-	ulong	UNUSED;
-};
-
 #include "../port/portdat.h"
 
 /*
--- /sys/src/9/rb/dat.h
+++ /sys/src/9/rb/dat.h
@@ -8,7 +8,6 @@ typedef struct Label	Label;
 typedef struct Lock	Lock;
 typedef struct Mach	Mach;
 typedef struct MMU	MMU;
-typedef struct Notsave	Notsave;
 typedef struct Pcidev	Pcidev;
 typedef struct PMMU	PMMU;
 typedef struct Softtlb	Softtlb;
@@ -122,14 +121,6 @@ struct PMMU
 	int	pidonmach[MAXMACH];
 };
 
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave
-{
-	ulong	nonempty;
-};
-
 #include "../port/portdat.h"
 
 /* First FIVE members' offsets known by l.s */
--- /sys/src/9/teg2/dat.h
+++ /sys/src/9/teg2/dat.h
@@ -33,7 +33,6 @@ typedef struct Memcache	Memcache;
 typedef struct MMMU	MMMU;
 typedef struct Mach	Mach;
 typedef u32int Mreg;				/* Msr - bloody UART */
-typedef struct Notsave	Notsave;
 typedef struct Page	Page;
 typedef struct Pcisiz Pcisiz;
 typedef struct Pcidev Pcidev;
@@ -135,13 +134,6 @@ struct Conf
 	int	monitor;	/* flag */
 };
 
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave {
-	int	emptiness;
-};
-
 /*
  *  MMU stuff in Mach.
  */
--- /sys/src/9/vt4/dat.h
+++ /sys/src/9/vt4/dat.h
@@ -8,7 +8,6 @@ typedef u32int Mreg;				/* Msr - bloody UART */
 typedef struct Page	Page;
 typedef struct FPsave	FPsave;
 typedef struct PMMU	PMMU;
-typedef struct Notsave	Notsave;
 typedef struct Proc	Proc;
 typedef struct Softtlb	Softtlb;
 typedef struct Sys	Sys;
@@ -144,14 +143,6 @@ struct PMMU
 	int	mmupid;
 };
 
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave
-{
-	int	emptiness;
-};
-
 /* debugging */
 #define TRIGGER()	*(int *)(PHYSSRAM + 0xf0) = 0
 
--- /sys/src/9/vt5/dat.h
+++ /sys/src/9/vt5/dat.h
@@ -8,7 +8,6 @@ typedef u32int Mreg;				/* Msr - bloody UART */
 typedef struct Page	Page;
 typedef struct FPsave	FPsave;
 typedef struct PMMU	PMMU;
-typedef struct Notsave	Notsave;
 typedef struct Proc	Proc;
 typedef struct Softtlb	Softtlb;
 typedef struct Sys	Sys;
@@ -142,14 +141,6 @@ struct PMMU
 	int	mmupid;
 };
 
-/*
- *  things saved in the Proc structure during a notify
- */
-struct Notsave
-{
-	int	emptiness;
-};
-
 /* debugging */
 #define TRIGGER()	*(int *)(PHYSSRAM + 0xf0) = 0