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-rw-r--r--sys/src/9/pc/mmu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/src/9/pc/mmu.c b/sys/src/9/pc/mmu.c
index c0f7b7718..2e77aaee7 100644
--- a/sys/src/9/pc/mmu.c
+++ b/sys/src/9/pc/mmu.c
@@ -679,7 +679,7 @@ vunmap(void *v, int size)
* boot. In that case it suffices to flush the MACH(0) TLB
* and return.
*/
- if(!active.thunderbirdsarego){
+ if(up == nil){
putcr3(PADDR(MACHP(0)->pdb));
return;
}