linux-kernel - [PATCH 3/6] fbdev: matrox: fix -Wextra build warnings

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Message-Id: <20200315041002.24473-4-rdunlap@infradead.org>
Date:   Sat, 14 Mar 2020 21:09:59 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        Antonino Daplas <adaplas@...il.com>,
        Florian Tobias Schandinat <FlorianSchandinat@....de>
Subject: [PATCH 3/6] fbdev: matrox: fix -Wextra build warnings

When 'DEBUG' is not defined, modify the dprintk() macro to use the
no_printk() macro instead of using <empty>.
This fixes build warnings when -Wextra is used and provides
printk format checking:

../drivers/video/fbdev/matrox/matroxfb_base.c:635:77: warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body]
../drivers/video/fbdev/matrox/matroxfb_Ti3026.c:632:54: warning: suggest braces around empty body in an ‘else’ statement [-Wempty-body]
../drivers/video/fbdev/matrox/matroxfb_Ti3026.c:654:53: warning: suggest braces around empty body in an ‘else’ statement [-Wempty-body]

Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc: dri-devel@...ts.freedesktop.org
Cc: linux-fbdev@...r.kernel.org
---
Alternative: use pr_debug() so that CONFIG_DYNAMIC_DEBUG can be used
at these sites.

 drivers/video/fbdev/matrox/matroxfb_base.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-next-20200313.orig/drivers/video/fbdev/matrox/matroxfb_base.h
+++ linux-next-20200313/drivers/video/fbdev/matrox/matroxfb_base.h
@@ -86,7 +86,7 @@
 #ifdef DEBUG
 #define dprintk(X...)	printk(X)
 #else
-#define dprintk(X...)
+#define dprintk(X...)	no_printk(X)
 #endif
 
 #ifndef PCI_SS_VENDOR_ID_SIEMENS_NIXDORF