Input: applespi - replace zero-length array with DECLARE_FLEX_ARRAY() helper

Zero-length arrays are deprecated and we are moving towards adopting
C99 flexible-array members, instead. So, replace zero-length arrays
declarations in anonymous union with the new DECLARE_FLEX_ARRAY()
helper macro.

This helper allows for flexible-array members in unions.

Link: https://github.com/KSPP/linux/issues/193
Link: https://github.com/KSPP/linux/issues/219
Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/YzIeJeqU73G+UI8g@work
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/keyboard/applespi.c b/drivers/input/keyboard/applespi.c
index fab5473..91a9810 100644 (file)
--- a/drivers/input/keyboard/applespi.c
+++ b/drivers/input/keyboard/applespi.c
@@ -311,7 +311,7 @@ struct message {
                struct command_protocol_mt_init init_mt_command;
                struct command_protocol_capsl   capsl_command;
                struct command_protocol_bl      bl_command;
-               u8                              data[0];
+               DECLARE_FLEX_ARRAY(u8,          data);
        };
 };