linux-kernel - [PATCH 1/2] fbdev: omapfb: avoid -Wempty-body warning

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Date:   Mon, 22 Mar 2021 11:52:59 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     dri-devel@...ts.freedesktop.org
Cc:     linux-fbdev@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] fbdev: omapfb: avoid -Wempty-body warning

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

Building with 'make W=1' shows a few harmless warnings:

drivers/video/fbdev/omap2/omapfb/omapfb-main.c: In function 'omapfb_calc_addr':
drivers/video/fbdev/omap2/omapfb/omapfb-main.c:823:56: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
  823 |                     var->xoffset, var->yoffset, offset);
      |                                                        ^
drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c: In function 'omapfb_ioctl':
drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c:911:45: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
  911 |                 DBG("ioctl failed: %d\n", r);

Avoid these by using no_printk(), which adds format string checking as
well.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/video/fbdev/omap2/omapfb/omapfb.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/omap2/omapfb/omapfb.h b/drivers/video/fbdev/omap2/omapfb/omapfb.h
index d27abccb37bc..1c1b5201c8b6 100644
--- a/drivers/video/fbdev/omap2/omapfb/omapfb.h
+++ b/drivers/video/fbdev/omap2/omapfb/omapfb.h
@@ -29,7 +29,7 @@ extern bool omapfb_debug;
 			printk(KERN_DEBUG "OMAPFB: " format, ## __VA_ARGS__); \
 	} while (0)
 #else
-#define DBG(format, ...)
+#define DBG(format, ...) no_printk(format, ## __VA_ARGS__)
 #endif
 
 #define FB2OFB(fb_info) ((struct omapfb_info *)(fb_info->par))
-- 
2.29.2