kernel: Apply the susfs patch

Co-authored-by: simonpunk <simonpunk2016@gmail.com>
Co-authored-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>

kernel/ksud.h

@@ -18,4 +18,23 @@ extern u32 ksu_file_sid;
 extern bool ksu_module_mounted;
 extern bool ksu_boot_completed;
 
+#ifdef CONFIG_KSU_SUSFS
+#define MAX_ARG_STRINGS 0x7FFFFFFF
+struct user_arg_ptr {
+#ifdef CONFIG_COMPAT
+    bool is_compat;
+#endif
+    union {
+        const char __user *const __user *native;
+#ifdef CONFIG_COMPAT
+        const compat_uptr_t __user *compat;
+#endif
+    } ptr;
+};
+
+int ksu_handle_execveat_ksud(int *fd, struct filename **filename_ptr,
+                             struct user_arg_ptr *argv,
+                             struct user_arg_ptr *envp, int *flags);
+#endif // #ifdef CONFIG_KSU_SUSFS
+
 #endif