1 files changed, 10 insertions, 5 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 541f4828f5e7..29b7d4f87d20 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -684,6 +684,7 @@ static inline void prefetch_stack(struct task_struct *t) { }
 
 struct audit_context;           /* See audit.c */
 struct mempolicy;
+struct pipe_inode_info;
 
 enum sleep_type {
         SLEEP_NORMAL,
@@ -882,6 +883,11 @@ struct task_struct {
 
         atomic_t fs_excl;       /* holding fs exclusive resources */
         struct rcu_head rcu;
+
+        /*
+         * cache last used pipe for splice
+         */
+        struct pipe_inode_info *splice_pipe;
 };
 
 static inline pid_t process_group(struct task_struct *tsk)
@@ -905,7 +911,6 @@ static inline int pid_alive(struct task_struct *p)
 extern void free_task(struct task_struct *tsk);
 #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
 
-extern void __put_task_struct_cb(struct rcu_head *rhp);
 extern void __put_task_struct(struct task_struct *t);
 
 static inline void put_task_struct(struct task_struct *t)
@@ -1187,8 +1192,7 @@ extern void wait_task_inactive(task_t * p);
 #define remove_parent(p)        list_del_init(&(p)->sibling)
 #define add_parent(p)           list_add_tail(&(p)->sibling,&(p)->parent->children)
 
-#define next_task(p)    list_entry((p)->tasks.next, struct task_struct, tasks)
-#define prev_task(p)    list_entry((p)->tasks.prev, struct task_struct, tasks)
+#define next_task(p)    list_entry(rcu_dereference((p)->tasks.next), struct task_struct, tasks)
 
 #define for_each_process(p) \
         for (p = &init_task ; (p = next_task(p)) != &init_task ; )
@@ -1203,9 +1207,10 @@ extern void wait_task_inactive(task_t * p);
 #define while_each_thread(g, t) \
         while ((t = next_thread(t)) != g)
 
-#define thread_group_leader(p)  (p->pid == p->tgid)
+/* de_thread depends on thread_group_leader not being a pid based check */
+#define thread_group_leader(p)  (p == p->group_leader)
 
-static inline task_t *next_thread(task_t *p)
+static inline task_t *next_thread(const task_t *p)
 {
         return list_entry(rcu_dereference(p->thread_group.next),
                                 task_t, thread_group);