[S390] incorrect PageTables counter for kvm page tables

The page_table_free_pgste function is used for kvm processes to free page
tables that have the pgste extension. It calls pgtable_page_ctor instead of
pgtable_page_dtor which increases NR_PAGETABLE instead of decreasing it.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 9a4d02f64f16e6af778555e89925ac71c9f76ce4..51b0738e13d12ef21ae05b68aa4ccc17d2862c9a 100644 (file)
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -574,7 +574,7 @@ static inline void page_table_free_pgste(unsigned long *table)
        page = pfn_to_page(__pa(table) >> PAGE_SHIFT);
        mp = (struct gmap_pgtable *) page->index;
        BUG_ON(!list_empty(&mp->mapper));
-       pgtable_page_ctor(page);
+       pgtable_page_dtor(page);
        atomic_set(&page->_mapcount, -1);
        kfree(mp);
        __free_page(page);