diff --git a/ap/os/linux/linux-3.4.x/kernel/uid16.c b/ap/os/linux/linux-3.4.x/kernel/uid16.c
new file mode 100644
index 0000000..51c6e89
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/kernel/uid16.c
@@ -0,0 +1,230 @@
+/*
+ *	Wrapper functions for 16bit uid back compatibility. All nicely tied
+ *	together in the faint hope we can take the out in five years time.
+ */
+
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/prctl.h>
+#include <linux/capability.h>
+#include <linux/init.h>
+#include <linux/highuid.h>
+#include <linux/security.h>
+#include <linux/syscalls.h>
+
+#include <asm/uaccess.h>
+
+SYSCALL_DEFINE3(chown16, const char __user *, filename, old_uid_t, user, old_gid_t, group)
+{
+	long ret = sys_chown(filename, low2highuid(user), low2highgid(group));
+	/* avoid REGPARM breakage on x86: */
+	asmlinkage_protect(3, ret, filename, user, group);
+	return ret;
+}
+
+SYSCALL_DEFINE3(lchown16, const char __user *, filename, old_uid_t, user, old_gid_t, group)
+{
+	long ret = sys_lchown(filename, low2highuid(user), low2highgid(group));
+	/* avoid REGPARM breakage on x86: */
+	asmlinkage_protect(3, ret, filename, user, group);
+	return ret;
+}
+
+SYSCALL_DEFINE3(fchown16, unsigned int, fd, old_uid_t, user, old_gid_t, group)
+{
+	long ret = sys_fchown(fd, low2highuid(user), low2highgid(group));
+	/* avoid REGPARM breakage on x86: */
+	asmlinkage_protect(3, ret, fd, user, group);
+	return ret;
+}
+
+SYSCALL_DEFINE2(setregid16, old_gid_t, rgid, old_gid_t, egid)
+{
+	long ret = sys_setregid(low2highgid(rgid), low2highgid(egid));
+	/* avoid REGPARM breakage on x86: */
+	asmlinkage_protect(2, ret, rgid, egid);
+	return ret;
+}
+
+SYSCALL_DEFINE1(setgid16, old_gid_t, gid)
+{
+	long ret = sys_setgid(low2highgid(gid));
+	/* avoid REGPARM breakage on x86: */
+	asmlinkage_protect(1, ret, gid);
+	return ret;
+}
+
+SYSCALL_DEFINE2(setreuid16, old_uid_t, ruid, old_uid_t, euid)
+{
+	long ret = sys_setreuid(low2highuid(ruid), low2highuid(euid));
+	/* avoid REGPARM breakage on x86: */
+	asmlinkage_protect(2, ret, ruid, euid);
+	return ret;
+}
+
+SYSCALL_DEFINE1(setuid16, old_uid_t, uid)
+{
+	long ret = sys_setuid(low2highuid(uid));
+	/* avoid REGPARM breakage on x86: */
+	asmlinkage_protect(1, ret, uid);
+	return ret;
+}
+
+SYSCALL_DEFINE3(setresuid16, old_uid_t, ruid, old_uid_t, euid, old_uid_t, suid)
+{
+	long ret = sys_setresuid(low2highuid(ruid), low2highuid(euid),
+				 low2highuid(suid));
+	/* avoid REGPARM breakage on x86: */
+	asmlinkage_protect(3, ret, ruid, euid, suid);
+	return ret;
+}
+
+SYSCALL_DEFINE3(getresuid16, old_uid_t __user *, ruid, old_uid_t __user *, euid, old_uid_t __user *, suid)
+{
+	const struct cred *cred = current_cred();
+	int retval;
+
+	if (!(retval   = put_user(high2lowuid(cred->uid),  ruid)) &&
+	    !(retval   = put_user(high2lowuid(cred->euid), euid)))
+		retval = put_user(high2lowuid(cred->suid), suid);
+
+	return retval;
+}
+
+SYSCALL_DEFINE3(setresgid16, old_gid_t, rgid, old_gid_t, egid, old_gid_t, sgid)
+{
+	long ret = sys_setresgid(low2highgid(rgid), low2highgid(egid),
+				 low2highgid(sgid));
+	/* avoid REGPARM breakage on x86: */
+	asmlinkage_protect(3, ret, rgid, egid, sgid);
+	return ret;
+}
+
+
+SYSCALL_DEFINE3(getresgid16, old_gid_t __user *, rgid, old_gid_t __user *, egid, old_gid_t __user *, sgid)
+{
+	const struct cred *cred = current_cred();
+	int retval;
+
+	if (!(retval   = put_user(high2lowgid(cred->gid),  rgid)) &&
+	    !(retval   = put_user(high2lowgid(cred->egid), egid)))
+		retval = put_user(high2lowgid(cred->sgid), sgid);
+
+	return retval;
+}
+
+SYSCALL_DEFINE1(setfsuid16, old_uid_t, uid)
+{
+	long ret = sys_setfsuid(low2highuid(uid));
+	/* avoid REGPARM breakage on x86: */
+	asmlinkage_protect(1, ret, uid);
+	return ret;
+}
+
+SYSCALL_DEFINE1(setfsgid16, old_gid_t, gid)
+{
+	long ret = sys_setfsgid(low2highgid(gid));
+	/* avoid REGPARM breakage on x86: */
+	asmlinkage_protect(1, ret, gid);
+	return ret;
+}
+
+static int groups16_to_user(old_gid_t __user *grouplist,
+    struct group_info *group_info)
+{
+	int i;
+	old_gid_t group;
+
+	for (i = 0; i < group_info->ngroups; i++) {
+		group = high2lowgid(GROUP_AT(group_info, i));
+		if (put_user(group, grouplist+i))
+			return -EFAULT;
+	}
+
+	return 0;
+}
+
+static int groups16_from_user(struct group_info *group_info,
+    old_gid_t __user *grouplist)
+{
+	int i;
+	old_gid_t group;
+
+	for (i = 0; i < group_info->ngroups; i++) {
+		if (get_user(group, grouplist+i))
+			return  -EFAULT;
+		GROUP_AT(group_info, i) = low2highgid(group);
+	}
+
+	return 0;
+}
+
+SYSCALL_DEFINE2(getgroups16, int, gidsetsize, old_gid_t __user *, grouplist)
+{
+	const struct cred *cred = current_cred();
+	int i;
+
+	if (gidsetsize < 0)
+		return -EINVAL;
+
+	i = cred->group_info->ngroups;
+	if (gidsetsize) {
+		if (i > gidsetsize) {
+			i = -EINVAL;
+			goto out;
+		}
+		if (groups16_to_user(grouplist, cred->group_info)) {
+			i = -EFAULT;
+			goto out;
+		}
+	}
+out:
+	return i;
+}
+
+SYSCALL_DEFINE2(setgroups16, int, gidsetsize, old_gid_t __user *, grouplist)
+{
+	struct group_info *group_info;
+	int retval;
+
+	if (!nsown_capable(CAP_SETGID))
+		return -EPERM;
+	if ((unsigned)gidsetsize > NGROUPS_MAX)
+		return -EINVAL;
+
+	group_info = groups_alloc(gidsetsize);
+	if (!group_info)
+		return -ENOMEM;
+	retval = groups16_from_user(group_info, grouplist);
+	if (retval) {
+		put_group_info(group_info);
+		return retval;
+	}
+
+	retval = set_current_groups(group_info);
+	put_group_info(group_info);
+
+	return retval;
+}
+
+SYSCALL_DEFINE0(getuid16)
+{
+	return high2lowuid(current_uid());
+}
+
+SYSCALL_DEFINE0(geteuid16)
+{
+	return high2lowuid(current_euid());
+}
+
+SYSCALL_DEFINE0(getgid16)
+{
+	return high2lowgid(current_gid());
+}
+
+SYSCALL_DEFINE0(getegid16)
+{
+	return high2lowgid(current_egid());
+}