X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=kernel%2Ffork.c;h=cf65139615a0d38e3fef37ee3a6e2e270c01ccaf;hb=2d2f5119b8bb057595e18f5b2f07aa097ea1b233;hp=b379d9abddc74c866f78eeca130f21239f5bea1e;hpb=27ba0644ea9dfe6e7693abc85837b60e40583b96;p=deliverable%2Flinux.git

diff --git a/kernel/fork.c b/kernel/fork.c
index b379d9abddc7..cf65139615a0 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -555,6 +555,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p)
 	INIT_LIST_HEAD(&mm->mmlist);
 	mm->core_state = NULL;
 	atomic_long_set(&mm->nr_ptes, 0);
+	mm_nr_pmds_init(mm);
 	mm->map_count = 0;
 	mm->locked_vm = 0;
 	mm->pinned_vm = 0;
@@ -603,6 +604,14 @@ static void check_mm(struct mm_struct *mm)
 			printk(KERN_ALERT "BUG: Bad rss-counter state "
 					  "mm:%p idx:%d val:%ld\n", mm, i, x);
 	}
+
+	if (atomic_long_read(&mm->nr_ptes))
+		pr_alert("BUG: non-zero nr_ptes on freeing mm: %ld\n",
+				atomic_long_read(&mm->nr_ptes));
+	if (mm_nr_pmds(mm))
+		pr_alert("BUG: non-zero nr_pmds on freeing mm: %ld\n",
+				mm_nr_pmds(mm));
+
 #if defined(CONFIG_TRANSPARENT_HUGEPAGE) && !USE_SPLIT_PMD_PTLOCKS
 	VM_BUG_ON_MM(mm->pmd_huge_pte, mm);
 #endif