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Date:   Mon, 26 Sep 2022 16:48:21 -0500
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        linux-hardening@...r.kernel.org
Subject: [PATCH][next] 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@...nel.org>
---
 drivers/input/keyboard/applespi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/keyboard/applespi.c b/drivers/input/keyboard/applespi.c
index fab5473ae5da..91a9810f6980 100644
--- 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);
 	};
 };
 
-- 
2.34.1

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