kernel: Remove prctl; use netlink communication to control manual_su

kernel/ksu_netlink.h

@@ -0,0 +1,23 @@
+#ifndef __KSU_NETLINK_H
+#define __KSU_NETLINK_H
+
+#include <linux/netlink.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+
+#define KSU_NETLINK_PROTOCOL 2
+#define KSU_NETLINK_CMD_MANUAL_SU 50
+
+struct ksu_netlink_msg {
+    int cmd;
+    int option;
+    uid_t target_uid;
+    pid_t target_pid;
+    char token_buffer[33];
+    int result;
+};
+
+int ksu_netlink_init(void);
+void ksu_netlink_exit(void);
+
+#endif