[PATCH] add process_session() helper routine

Replace occurences of task->signal->session by a new process_session() helper
routine.

It will be useful for pid namespaces to abstract the session pid number.

Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 5e8a0ba61749..270d864a8ff1 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1047,6 +1047,11 @@ static inline pid_t process_group(struct task_struct *tsk)
         return tsk->signal->pgrp;
 }
 
+static inline pid_t process_session(struct task_struct *tsk)
+{
+        return tsk->signal->session;
+}
+
 static inline struct pid *task_pid(struct task_struct *task)
 {
         return task->pids[PIDTYPE_PID].pid;