PPC32: add in the architecture-dependent security hooks.

This adds the sys_security entry to the syscall table and
calls the ptrace security op in ptrace.

arch/ppc/kernel/misc.S

@@ -1296,6 +1296,7 @@ _GLOBAL(sys_call_table)
 	.long sys_futex
 	.long sys_sched_setaffinity
 	.long sys_sched_getaffinity
+	.long sys_security
 	.rept NR_syscalls-(.-sys_call_table)/4
 		.long sys_ni_syscall
 	.endr

arch/ppc/kernel/ptrace.c

@@ -28,6 +28,7 @@
 #include <linux/errno.h>
 #include <linux/ptrace.h>
 #include <linux/user.h>
+#include <linux/security.h>
 
 #include <asm/uaccess.h>
 #include <asm/page.h>
@@ -168,6 +169,9 @@ int sys_ptrace(long request, long pid, long addr, long data)
 		/* are we already being traced? */
 		if (current->ptrace & PT_PTRACED)
 			goto out;
+		ret = security_ops->ptrace(current->parent, current);
+		if (ret)
+			goto out;
 		/* set the ptrace bit in the process flags. */
 		current->ptrace |= PT_PTRACED;
 		ret = 0;