http://bugzilla.openvz.org/show_bug.cgi?id=1687

C/R: Use in_gate_area_no_task helper to test task's checkpoint-ability v2

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
---
 arch/x86/mm/init_64.c    |    1 +
 kernel/cpt/cpt_process.c |    3 +--
 2 files changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6-openvz/arch/x86/mm/init_64.c
=====================================================================
--- linux-2.6-openvz.orig/arch/x86/mm/init_64.c
+++ linux-2.6-openvz/arch/x86/mm/init_64.c
@@ -893,6 +893,7 @@ int in_gate_area_no_task(unsigned long a
 {
 	return (addr >= VSYSCALL_START) && (addr < VSYSCALL_END);
 }
+EXPORT_SYMBOL(in_gate_area_no_task);
 
 const char *arch_vma_name(struct vm_area_struct *vma)
 {
Index: linux-2.6-openvz/kernel/cpt/cpt_process.c
=====================================================================
--- linux-2.6-openvz.orig/kernel/cpt/cpt_process.c
+++ linux-2.6-openvz/kernel/cpt/cpt_process.c
@@ -40,8 +40,7 @@ int check_task_state(struct task_struct 
 {
 #ifdef CONFIG_X86_64
 	if (!(task_thread_info(tsk)->flags&_TIF_IA32)) {
-		if (task_pt_regs(tsk)->ip >= VSYSCALL_START &&
-				task_pt_regs(tsk)->ip < VSYSCALL_END) {
+		if (in_gate_area_no_task(task_pt_regs(tsk)->ip)) {
 			eprintk_ctx(CPT_FID "cannot be checkpointied while vsyscall, try later\n", CPT_TID(tsk));
 			return -EAGAIN;
 		}