[ARM] Add security framework hooks (ptrace and syscall)

arch/arm/kernel/calls.S

@@ -237,7 +237,7 @@ __syscall_start:
 /* 220 */	.long	sys_madvise
 		.long	sys_fcntl64
 		.long	sys_ni_syscall /* TUX */
-		.long	sys_ni_syscall /* Security */
+		.long	sys_security
 		.long	sys_gettid
 /* 225 */	.long	sys_readahead
 		.long	sys_setxattr

arch/arm/kernel/ptrace.c

@@ -17,6 +17,7 @@
 #include <linux/smp_lock.h>
 #include <linux/ptrace.h>
 #include <linux/user.h>
+#include <linux/security.h>
 
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
@@ -655,6 +656,9 @@ asmlinkage 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;