ptrace: s/parent/real_parent/ in binfmt_elf_fdpic.c

->real_parent is the parent. ->parent may be the tracer.

Signed-off-by: Oleg Nesterov <[e-mail]>
Acked-by: David Howells <[e-mail]>
Acked-by: Roland McGrath <[e-mail]>
Cc: Greg Ungerer <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/binfmt_elf_fdpic.c

···
 	prstatus->pr_sigpend = p->pending.signal.sig[0];
 	prstatus->pr_sighold = p->blocked.sig[0];
 	prstatus->pr_pid = task_pid_vnr(p);
-	prstatus->pr_ppid = task_pid_vnr(p->parent);
+	prstatus->pr_ppid = task_pid_vnr(p->real_parent);
 	prstatus->pr_pgrp = task_pgrp_vnr(p);
 	prstatus->pr_sid = task_session_vnr(p);
 	if (thread_group_leader(p)) {
···
 	psinfo->pr_psargs[len] = 0;
 
 	psinfo->pr_pid = task_pid_vnr(p);
-	psinfo->pr_ppid = task_pid_vnr(p->parent);
+	psinfo->pr_ppid = task_pid_vnr(p->real_parent);
 	psinfo->pr_pgrp = task_pgrp_vnr(p);
 	psinfo->pr_sid = task_session_vnr(p);