IPC: introduce ipc_update_perm()

The IPC_SET command performs the same permission setting for all IPCs.  This
patch introduces a common ipc_update_perm() function to update these
permissions and makes use of it for all IPCs.

Signed-off-by: Pierre Peiffer <pierre.peiffer@bull.net>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: Nadia Derbey <Nadia.Derbey@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/ipc/shm.c b/ipc/shm.c
index 5e296b04bd6b..20e03dfc6adb 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -656,10 +656,7 @@ static int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd,
                 do_shm_rmid(ns, ipcp);
                 goto out_up;
         case IPC_SET:
-                ipcp->uid = shmid64.shm_perm.uid;
-                ipcp->gid = shmid64.shm_perm.gid;
-                ipcp->mode = (ipcp->mode & ~S_IRWXUGO)
-                        | (shmid64.shm_perm.mode & S_IRWXUGO);
+                ipc_update_perm(&shmid64.shm_perm, ipcp);
                 shp->shm_ctim = get_seconds();
                 break;
         default: