Remove execution domain support

All users of exec_domain are gone, now we can get rid
of that abandoned feature.
To not break existing userspace we keep a dummy
/proc/execdomains file which will always contain
"0-0     Linux                   [kernel]".

Signed-off-by: Richard Weinberger <richard@nod.at>

1 files changed, 0 insertions, 4 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index cf65139615a0..f2c1e7352298 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1279,9 +1279,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         if (nr_threads >= max_threads)
                 goto bad_fork_cleanup_count;
 
-        if (!try_module_get(task_thread_info(p)->exec_domain->module))
-                goto bad_fork_cleanup_count;
-
         delayacct_tsk_init(p);  /* Must remain after dup_task_struct() */
         p->flags &= ~(PF_SUPERPRIV | PF_WQ_WORKER);
         p->flags |= PF_FORKNOEXEC;
@@ -1590,7 +1587,6 @@ bad_fork_cleanup_threadgroup_lock:
         if (clone_flags & CLONE_THREAD)
                 threadgroup_change_end(current);
         delayacct_tsk_free(p);
-        module_put(task_thread_info(p)->exec_domain->module);
 bad_fork_cleanup_count:
         atomic_dec(&p->cred->user->processes);
         exit_creds(p);