1 files changed, 8 insertions, 5 deletions

diff --git a/include/linux/freezer.h b/include/linux/freezer.h
index 6e05e3e7ce39..5e75e26d4787 100644
--- a/include/linux/freezer.h
+++ b/include/linux/freezer.h
@@ -1,5 +1,7 @@
 /* Freezer declarations */
 
+#include <linux/sched.h>
+
 #ifdef CONFIG_PM
 /*
  * Check if a process has been frozen
@@ -14,16 +16,15 @@ static inline int frozen(struct task_struct *p)
  */
 static inline int freezing(struct task_struct *p)
 {
-        return p->flags & PF_FREEZE;
+        return test_tsk_thread_flag(p, TIF_FREEZE);
 }
 
 /*
  * Request that a process be frozen
- * FIXME: SMP problem. We may not modify other process' flags!
  */
 static inline void freeze(struct task_struct *p)
 {
-        p->flags |= PF_FREEZE;
+        set_tsk_thread_flag(p, TIF_FREEZE);
 }
 
 /*
@@ -31,7 +32,7 @@ static inline void freeze(struct task_struct *p)
  */
 static inline void do_not_freeze(struct task_struct *p)
 {
-        p->flags &= ~PF_FREEZE;
+        clear_tsk_thread_flag(p, TIF_FREEZE);
 }
 
 /*
@@ -52,7 +53,9 @@ static inline int thaw_process(struct task_struct *p)
  */
 static inline void frozen_process(struct task_struct *p)
 {
-        p->flags = (p->flags & ~PF_FREEZE) | PF_FROZEN;
+        p->flags |= PF_FROZEN;
+        wmb();
+        clear_tsk_thread_flag(p, TIF_FREEZE);
 }
 
 extern void refrigerator(void);