1 files changed, 23 insertions, 3 deletions

diff --git a/include/linux/freezer.h b/include/linux/freezer.h
index 1effc8b56b4e..a49b52934c55 100644
--- a/include/linux/freezer.h
+++ b/include/linux/freezer.h
@@ -49,6 +49,7 @@ extern int thaw_process(struct task_struct *p);
 
 extern void refrigerator(void);
 extern int freeze_processes(void);
+extern int freeze_kernel_threads(void);
 extern void thaw_processes(void);
 
 static inline int try_to_freeze(void)
@@ -134,10 +135,25 @@ static inline void set_freezable_with_signal(void)
 }
 
 /*
- * Freezer-friendly wrappers around wait_event_interruptible() and
- * wait_event_interruptible_timeout(), originally defined in <linux/wait.h>
+ * Freezer-friendly wrappers around wait_event_interruptible(),
+ * wait_event_killable() and wait_event_interruptible_timeout(), originally
+ * defined in <linux/wait.h>
  */
 
+#define wait_event_freezekillable(wq, condition)                        \
+({                                                                      \
+        int __retval;                                                   \
+        do {                                                            \
+                __retval = wait_event_killable(wq,                      \
+                                (condition) || freezing(current));      \
+                if (__retval && !freezing(current))                     \
+                        break;                                          \
+                else if (!(condition))                                  \
+                        __retval = -ERESTARTSYS;                        \
+        } while (try_to_freeze());                                      \
+        __retval;                                                       \
+})
+
 #define wait_event_freezable(wq, condition)                             \
 ({                                                                      \
         int __retval;                                                   \
@@ -171,7 +187,8 @@ static inline void clear_freeze_flag(struct task_struct *p) {}
 static inline int thaw_process(struct task_struct *p) { return 1; }
 
 static inline void refrigerator(void) {}
-static inline int freeze_processes(void) { BUG(); return 0; }
+static inline int freeze_processes(void) { return -ENOSYS; }
+static inline int freeze_kernel_threads(void) { return -ENOSYS; }
 static inline void thaw_processes(void) {}
 
 static inline int try_to_freeze(void) { return 0; }
@@ -188,6 +205,9 @@ static inline void set_freezable_with_signal(void) {}
 #define wait_event_freezable_timeout(wq, condition, timeout)            \
                 wait_event_interruptible_timeout(wq, condition, timeout)
 
+#define wait_event_freezekillable(wq, condition)                \
+                wait_event_killable(wq, condition)
+
 #endif /* !CONFIG_FREEZER */
 
 #endif  /* FREEZER_H_INCLUDED */