kernel: don't use 0(root uid) as manager init uid

kernel/ksu.h

@@ -0,0 +1,38 @@
+#ifndef __KSU_H_KSU
+#define __KSU_H_KSU
+
+#include "linux/uidgid.h"
+#define KERNEL_SU_VERSION 9
+
+#define KERNEL_SU_OPTION 0xDEADBEEF
+
+#define CMD_GRANT_ROOT 0
+
+#define CMD_BECOME_MANAGER 1
+#define CMD_GET_VERSION 2
+#define CMD_ALLOW_SU 3
+#define CMD_DENY_SU 4
+#define CMD_GET_ALLOW_LIST 5
+#define CMD_GET_DENY_LIST 6
+
+#define INVALID_UID -1
+
+extern uid_t ksu_manager_uid;
+
+static inline bool ksu_is_manager_uid_valid() {
+    return ksu_manager_uid != INVALID_UID;
+}
+
+static inline uid_t ksu_get_manager_uid() {
+    return ksu_manager_uid;
+}
+
+static inline void ksu_set_manager_uid(uid_t uid) {
+    ksu_manager_uid = uid;
+}
+
+static inline void ksu_invalidate_manager_uid() {
+    ksu_manager_uid = INVALID_UID;
+}
+
+#endif