From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Fri, 17 Feb 2012 09:29:21 +0000 (+0100)
Subject: [S390] incorrect PageTables counter for kvm page tables
X-Git-Tag: v3.3-rc5~31^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2320c5793790fcda80e6dcc088dbda86040235e5;p=platform%2Fkernel%2Flinux-3.10.git

[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 9a4d02f..51b0738e 100644
--- 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);