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diff --git a/sys/powerpc/aim/mmu_radix.c b/sys/powerpc/aim/mmu_radix.c
--- a/sys/powerpc/aim/mmu_radix.c
+++ b/sys/powerpc/aim/mmu_radix.c
@@ -5978,6 +5978,7 @@
if (__predict_false(pm == NULL))
pm = &curthread->td_proc->p_vmspace->vm_pmap;
+ PMAP_LOCK(pm);
while (sz > 0) {
pa = pmap_extract(pm, va);
sync_sz = PAGE_SIZE - (va & PAGE_MASK);
@@ -5989,6 +5990,7 @@
va += sync_sz;
sz -= sync_sz;
}
+ PMAP_UNLOCK(pm);
}
static __inline void

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