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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
@@ -3137,6 +3137,28 @@
return (rv);
}
+/*
+ * Release a page table page reference after a failed attempt to create a
+ * mapping.
+ */
+static void
+pmap_abort_ptp(pmap_t pmap, vm_offset_t va, vm_page_t pdpg)
+{
+ struct spglist free;
+
+ SLIST_INIT(&free);
+ if (pmap_unwire_ptp(pmap, va, pdpg, &free)) {
+ /*
+ * Although "va" is not mapped, paging-
+ * structure caches could nonetheless have
+ * entries that refer to the freed page table
+ * pages. Invalidate those entries.
+ */
+ pmap_invalidate_page(pmap, va);
+ vm_page_free_pages_toq(&free, true);
+ }
+}
+
/*
* Tries to create a read- and/or execute-only 2MB page mapping. Returns true
* if successful. Returns false if (1) a page table page cannot be allocated
@@ -3264,17 +3286,7 @@
* Abort this mapping if its PV entry could not be created.
*/
if (!pmap_pv_insert_l3e(pmap, va, newpde, flags, lockp)) {
- SLIST_INIT(&free);
- if (pmap_unwire_ptp(pmap, va, pdpg, &free)) {
- /*
- * Although "va" is not mapped, paging-
- * structure caches could nonetheless have
- * entries that refer to the freed page table
- * pages. Invalidate those entries.
- */
- pmap_invalidate_page(pmap, va);
- vm_page_free_pages_toq(&free, true);
- }
+ pmap_abort_ptp(pmap, va, pdpg);
if (uwptpg != NULL) {
mt = pmap_remove_pt_page(pmap, va);
KASSERT(mt == uwptpg,

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