CRED: Separate task security context from task_struct

Separate the task security context from task_struct.  At this point, the
security data is temporarily embedded in the task_struct with two pointers
pointing to it.

Note that the Alpha arch is altered as it refers to (E)UID and (E)GID in
entry.S via asm-offsets.

With comment fixes Signed-off-by: Marc Dionne <marc.c.dionne@gmail.com>

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 5 insertions, 5 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index 80137a5d9467..e0f6e1892fb9 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -160,7 +160,7 @@ void release_task(struct task_struct * p)
         int zap_leader;
 repeat:
         tracehook_prepare_release_task(p);
-        atomic_dec(&p->user->processes);
+        atomic_dec(&p->cred->user->processes);
         proc_flush_task(p);
         write_lock_irq(&tasklist_lock);
         tracehook_finish_release_task(p);
@@ -1272,7 +1272,7 @@ static int wait_task_zombie(struct task_struct *p, int options,
                 return 0;
 
         if (unlikely(options & WNOWAIT)) {
-                uid_t uid = p->uid;
+                uid_t uid = p->cred->uid;
                 int exit_code = p->exit_code;
                 int why, status;
 
@@ -1393,7 +1393,7 @@ static int wait_task_zombie(struct task_struct *p, int options,
         if (!retval && infop)
                 retval = put_user(pid, &infop->si_pid);
         if (!retval && infop)
-                retval = put_user(p->uid, &infop->si_uid);
+                retval = put_user(p->cred->uid, &infop->si_uid);
         if (!retval)
                 retval = pid;
 
@@ -1458,7 +1458,7 @@ static int wait_task_stopped(int ptrace, struct task_struct *p,
         if (!unlikely(options & WNOWAIT))
                 p->exit_code = 0;
 
-        uid = p->uid;
+        uid = p->cred->uid;
 unlock_sig:
         spin_unlock_irq(&p->sighand->siglock);
         if (!exit_code)
@@ -1535,7 +1535,7 @@ static int wait_task_continued(struct task_struct *p, int options,
         spin_unlock_irq(&p->sighand->siglock);
 
         pid = task_pid_vnr(p);
-        uid = p->uid;
+        uid = p->cred->uid;
         get_task_struct(p);
         read_unlock(&tasklist_lock);