linux-hardening - [PATCH][next] Input: libps2 - Use fallthrough pseudo-keyword

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Date:   Thu, 8 Oct 2020 17:25:14 -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: libps2 - Use fallthrough pseudo-keyword

In order to enable -Wimplicit-fallthrough for Clang[1], replace the
existing /* Fall through */ comment with the new pseudo-keyword
macro fallthrough[2].

[1] https://git.kernel.org/linus/e2079e93f562c7f7a030eb7642017ee5eabaaa10
[2] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 drivers/input/serio/libps2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/serio/libps2.c b/drivers/input/serio/libps2.c
index 8a16e41f7b7f..250e213cc80c 100644
--- a/drivers/input/serio/libps2.c
+++ b/drivers/input/serio/libps2.c
@@ -405,7 +405,7 @@ bool ps2_handle_ack(struct ps2dev *ps2dev, u8 data)
 			ps2dev->nak = PS2_RET_ERR;
 			break;
 		}
-		/* Fall through */
+		fallthrough;
 
 	/*
 	 * Workaround for mice which don't ACK the Get ID command.
-- 
2.27.0