[PATCH] remove get_task_struct_rcu()

The latest set of signal-RCU patches does not use get_task_struct_rcu().
Attached is a patch that removes it.

Signed-off-by: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 0 insertions, 12 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index a6af77e9b4cf..20bd70749104 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -878,18 +878,6 @@ extern void free_task(struct task_struct *tsk);
 extern void __put_task_struct(struct task_struct *tsk);
 #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
 
-static inline int get_task_struct_rcu(struct task_struct *t)
-{
-        int oldusage;
-
-        do {
-                oldusage = atomic_read(&t->usage);
-                if (oldusage == 0)
-                        return 0;
-        } while (cmpxchg(&t->usage.counter, oldusage, oldusage+1) != oldusage);
-        return 1;
-}
-
 extern void __put_task_struct_cb(struct rcu_head *rhp);
 
 static inline void put_task_struct(struct task_struct *t)