linux-kernel - [PATCH 4.4 025/105] drm: extra printk() wrapper macros

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Message-Id: <20171215092307.181537002@linuxfoundation.org>
Date:   Fri, 15 Dec 2017 10:44:23 +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, Dave Gordon <david.s.gordon@...el.com>,
        Eric Engestrom <eric.engestrom@...tec.com>,
        dri-devel@...ts.freedesktop.org, Dave Airlie <airlied@...hat.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...el.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 4.4 025/105] drm: extra printk() wrapper macros

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

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

From: Dave Gordon <david.s.gordon@...el.com>

commit 30b0da8d556e65ff935a56cd82c05ba0516d3e4a upstream.

We had only DRM_INFO() and DRM_ERROR(), whereas the underlying printk()
provides several other useful intermediate levels such as NOTICE and
WARNING. So this patch fills out the set by providing both regular and
once-only macros for each of the levels INFO, NOTICE, and WARNING, using
a common underlying macro that does all the token-pasting.

DRM_ERROR is unchanged, as it's not just a printk wrapper.

v2:
    Fix whitespace, missing ## (Eric Engestrom)

Signed-off-by: Dave Gordon <david.s.gordon@...el.com>
Reviewed-by: Eric Engestrom <eric.engestrom@...tec.com>
Cc: dri-devel@...ts.freedesktop.org
Acked-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@...el.com>
Cc: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 include/drm/drmP.h |   26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -158,6 +158,26 @@ void drm_err(const char *format, ...);
 /** \name Macros to make printk easier */
 /*@{*/
 
+#define _DRM_PRINTK(once, level, fmt, ...)				\
+	do {								\
+		printk##once(KERN_##level "[" DRM_NAME "] " fmt,	\
+			     ##__VA_ARGS__);				\
+	} while (0)
+
+#define DRM_INFO(fmt, ...)						\
+	_DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
+#define DRM_NOTE(fmt, ...)						\
+	_DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__)
+#define DRM_WARN(fmt, ...)						\
+	_DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)
+
+#define DRM_INFO_ONCE(fmt, ...)						\
+	_DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__)
+#define DRM_NOTE_ONCE(fmt, ...)						\
+	_DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)
+#define DRM_WARN_ONCE(fmt, ...)						\
+	_DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)
+
 /**
  * Error output.
  *
@@ -183,12 +203,6 @@ void drm_err(const char *format, ...);
 		drm_err(fmt, ##__VA_ARGS__);				\
 })
 
-#define DRM_INFO(fmt, ...)				\
-	printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
-
-#define DRM_INFO_ONCE(fmt, ...)				\
-	printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
-
 /**
  * Debug output.
  *