[PATCH] mm/pgtable/debug: Fix test validating architecture page table helpers

[Christophe Leroy <christophe.leroy@xxxxxx>]

Fix build failure on powerpc.

Fix preemption imbalance.

Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
---
 mm/arch_pgtable_test.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mm/arch_pgtable_test.c b/mm/arch_pgtable_test.c
index 8b4a92756ad8..f2b3c9ec35fa 100644
--- a/mm/arch_pgtable_test.c
+++ b/mm/arch_pgtable_test.c
@@ -24,6 +24,7 @@
 #include <linux/swap.h>
 #include <linux/swapops.h>
 #include <linux/sched/mm.h>
+#include <linux/highmem.h>
 #include <asm/pgalloc.h>
 #include <asm/pgtable.h>
 
@@ -400,6 +401,8 @@ static int __init arch_pgtable_tests_init(void)
 	p4d_clear_tests(p4dp);
 	pgd_clear_tests(mm, pgdp);
 
+	pte_unmap(ptep);
+
 	pmd_populate_tests(mm, pmdp, saved_ptep);
 	pud_populate_tests(mm, pudp, saved_pmdp);
 	p4d_populate_tests(mm, p4dp, saved_pudp);
-- 
2.13.3