linux-kernel - [PATCH 4.4 03/74] usbip: Fix implicit fallthrough warning

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Date:   Mon, 29 Jan 2018 13:56:08 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Peter Senna Tschudin <peter.senna@...il.com>,
        Jonathan Dieter <jdieter@...bg.com>,
        Shuah Khan <shuahkh@....samsung.com>
Subject: [PATCH 4.4 03/74] usbip: Fix implicit fallthrough warning

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jonathan Dieter <jdieter@...bg.com>

commit cfd6ed4537a9e938fa76facecd4b9cd65b6d1563 upstream.

GCC 7 now warns when switch statements fall through implicitly, and with
-Werror enabled in configure.ac, that makes these tools unbuildable.

We fix this by notifying the compiler that this particular case statement
is meant to fall through.

Reviewed-by: Peter Senna Tschudin <peter.senna@...il.com>
Signed-off-by: Jonathan Dieter <jdieter@...bg.com>
Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 tools/usb/usbip/src/usbip.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/tools/usb/usbip/src/usbip.c
+++ b/tools/usb/usbip/src/usbip.c
@@ -176,6 +176,8 @@ int main(int argc, char *argv[])
 			break;
 		case '?':
 			printf("usbip: invalid option\n");
+			/* Terminate after printing error */
+			/* FALLTHRU */
 		default:
 			usbip_usage();
 			goto out;