[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, 1 insertions, 1 deletions

diff --git a/kernel/signal.c b/kernel/signal.c
index ec81defde339..9eac4db60eda 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -583,7 +583,7 @@ static int check_kill_permission(int sig, struct siginfo *info,
         error = -EPERM;
         if ((info == SEND_SIG_NOINFO || (!is_si_special(info) && SI_FROMUSER(info)))
             && ((sig != SIGCONT) ||
-                (current->signal->session != t->signal->session))
+                (process_session(current) != process_session(t)))
             && (current->euid ^ t->suid) && (current->euid ^ t->uid)
             && (current->uid ^ t->suid) && (current->uid ^ t->uid)
             && !capable(CAP_KILL))