--- /sys/src/9k/k10/fns.h
+++ /sys/src/9k/k10/fns.h
@@ -76,6 +76,7 @@ void	mapupainit(uvlong, ulong);
 int	memcolor(uintmem, uintmem*);
 void	meminit(void);
 void	mfence(void);
+void	mmucachectl(Page*, uint);
 void	mmuflushtlb(u64int);
 void	mmuinit(void);
 u64int	mmuphysaddr(uintptr);
--- /sys/src/9k/k10/main.c
+++ /sys/src/9k/k10/main.c
@@ -405,7 +405,7 @@ userinit(void)
 	s->flushme++;
 	p->seg[TSEG] = s;
 	pg = newpage(1, s, UTZERO, 0);
-	memset(pg->cachectl, PG_TXTFLUSH, sizeof(pg->cachectl));
+	mmucachectl(pg, PG_TXTFLUSH);
 	segpage(s, pg);
 	k = kmap(s->map[0]->pages[0]);
 	memmove(UINT2PTR(VA(k)), initcode, sizeof initcode);
--- /sys/src/9k/k10/mmu.c
+++ /sys/src/9k/k10/mmu.c
@@ -617,6 +617,13 @@ pte[PTLX(KSEG1PML4, 3)] = m->pml4->pa|PteRW|PteP;
 	mmuphysaddr(PTR2UINT(end));
 }
 
+void
+mmucachectl(Page *p, uint why)
+{
+	if(!pagedout(p))
+		memset(p->cachectl, why, sizeof(p->cachectl));
+}
+
 /*
  * Double-check the user MMU.
  * Error checking only.
--- /sys/src/9k/port/devproc.c
+++ /sys/src/9k/port/devproc.c
@@ -1612,7 +1612,7 @@ procctlmemio(Proc *p, uintptr offset, int n, void *va, int read)
 
 	/* Ensure the process sees text page changes */
 	if(s->flushme)
-		memset(pg->cachectl, PG_TXTFLUSH, sizeof(pg->cachectl));
+		mmucachectl(pg, PG_TXTFLUSH);
 
 	s->steal--;
 
--- /sys/src/9k/port/fault.c
+++ /sys/src/9k/port/fault.c
@@ -261,7 +261,7 @@ pio(Segment *s, uintptr addr, uintptr soff, Page **p)
 		putpage(new);
 
 	if(s->flushme)
-		memset((*p)->cachectl, PG_TXTFLUSH, sizeof((*p)->cachectl));
+		mmucachectl(*p, PG_TXTFLUSH);
 }
 
 /*
--- /sys/src/9k/port/page.c
+++ /sys/src/9k/port/page.c
@@ -250,8 +250,7 @@ newpage(int clear, Segment *s, uintptr va, int locked)
 	p->ref++;
 	p->va = va;
 	p->modref = 0;
-	for(i = 0; i < MACHMAX; i++)
-		p->cachectl[i] = ct;
+	mmucachectl(p, ct);
 	unlock(p);
 	unlock(&palloc);
 
--- /sys/src/9k/port/sysseg.c
+++ /sys/src/9k/port/sysseg.c
@@ -372,13 +372,9 @@ static void
 pteflush(Pte *pte, int s, int e)
 {
 	int i;
-	Page *p;
 
-	for(i = s; i < e; i++) {
-		p = pte->pages[i];
-		if(pagedout(p) == 0)
-			memset(p->cachectl, PG_TXTFLUSH, sizeof(p->cachectl));
-	}
+	for(i = s; i < e; i++)
+		mmucachectl(pte->pages[i], PG_TXTFLUSH);
 }
 
 void