diff --git a/[refs] b/[refs]
index f0446ecb469d..e255638bce21 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cdc1793ef7f5ccc47696e3d00b827e832e4c5bdb
+refs/heads/master: 2f30c00702aca3229e1157718675f0ee56d2a931
diff --git a/trunk/arch/i386/kernel/sysenter.c b/trunk/arch/i386/kernel/sysenter.c
index ff4ee6f3326b..6deb159d08e0 100644
--- a/trunk/arch/i386/kernel/sysenter.c
+++ b/trunk/arch/i386/kernel/sysenter.c
@@ -336,7 +336,9 @@ struct vm_area_struct *get_gate_vma(struct task_struct *tsk)
 
 int in_gate_area(struct task_struct *task, unsigned long addr)
 {
-	return 0;
+	const struct vm_area_struct *vma = get_gate_vma(task);
+
+	return vma && addr >= vma->vm_start && addr < vma->vm_end;
 }
 
 int in_gate_area_no_task(unsigned long addr)