linux-kernel - [PATCH 2/2] staging/nvec:: avoid Wempty-body warning

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Date:   Mon, 22 Mar 2021 11:35:40 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Marc Dietrich <marvin24@....de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Kumar Kartikeya Dwivedi <memxor@...il.com>,
        ac100@...ts.launchpad.net, linux-tegra@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] staging/nvec:: avoid Wempty-body warning

From: Arnd Bergmann <arnd@...db.de>

This driver has a few disabled diagnostics, which can probably
just get removed, or might still be helpful:

drivers/staging/nvec/nvec_ps2.c: In function 'nvec_ps2_notifier':
drivers/staging/nvec/nvec_ps2.c:94:77: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
   94 |                         NVEC_PHD("unhandled mouse event: ", msg, msg[1] + 2);

Changing the empty macro to the usual 'do {} while (0)' at least
shuts up the compiler warnings.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/staging/nvec/nvec_ps2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/nvec/nvec_ps2.c b/drivers/staging/nvec/nvec_ps2.c
index 157009015c3b..06041c7f7d4f 100644
--- a/drivers/staging/nvec/nvec_ps2.c
+++ b/drivers/staging/nvec/nvec_ps2.c
@@ -28,7 +28,7 @@
 	print_hex_dump(KERN_DEBUG, str, DUMP_PREFIX_NONE, \
 			16, 1, buf, len, false)
 #else
-#define NVEC_PHD(str, buf, len)
+#define NVEC_PHD(str, buf, len) do { } while (0)
 #endif
 
 enum ps2_subcmds {
-- 
2.29.2