drm: Create and use drm_err

Reduce drm text size ~1% by using drm_err and
printf extension %pV to emit error messages.

Remove unused macro DRM_MEM_ERROR.

$ size drivers/gpu/drm/built-in.o*
   text	   data	    bss	    dec	    hex	filename
 361159	   9663	    256	 371078	  5a986	drivers/gpu/drm/built-in.o.new
 365416	   9663	    256	 375335	  5ba27	drivers/gpu/drm/built-in.o.old
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_stub.c

@@ -62,6 +62,26 @@ struct idr drm_minors_idr;
 struct class *drm_class;
 struct proc_dir_entry *drm_proc_root;
 struct dentry *drm_debugfs_root;
+
+int drm_err(const char *func, const char *format, ...)
+{
+	struct va_format vaf;
+	va_list args;
+	int r;
+
+	va_start(args, format);
+
+	vaf.fmt = format;
+	vaf.va = &args;
+
+	r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf);
+
+	va_end(args);
+
+	return r;
+}
+EXPORT_SYMBOL(drm_err);
+
 void drm_ut_debug_printk(unsigned int request_level,
 			 const char *prefix,
 			 const char *function_name,
@@ -78,6 +98,7 @@ void drm_ut_debug_printk(unsigned int request_level,
 	}
 }
 EXPORT_SYMBOL(drm_ut_debug_printk);
+
 static int drm_minor_get_id(struct drm_device *dev, int type)
 {
 	int new_id;

include/drm/drmP.h

@@ -126,6 +126,9 @@ extern void drm_ut_debug_printk(unsigned int request_level,
 				const char *prefix,
 				const char *function_name,
 				const char *format, ...);
+extern __attribute__((format (printf, 2, 3)))
+int drm_err(const char *func, const char *format, ...);
+
 /***********************************************************************/
 /** \name DRM template customization defaults */
 /*@{*/
@@ -181,21 +184,11 @@ extern void drm_ut_debug_printk(unsigned int request_level,
  * \param fmt printf() like format string.
  * \param arg arguments
  */
-#define DRM_ERROR(fmt, arg...) \
-	printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* " fmt , __func__ , ##arg)
-
-/**
- * Memory error output.
- *
- * \param area memory area where the error occurred.
- * \param fmt printf() like format string.
- * \param arg arguments
- */
-#define DRM_MEM_ERROR(area, fmt, arg...) \
-	printk(KERN_ERR "[" DRM_NAME ":%s:%s] *ERROR* " fmt , __func__, \
-	       drm_mem_stats[area].name , ##arg)
+#define DRM_ERROR(fmt, ...)				\
+	drm_err(__func__, fmt, ##__VA_ARGS__)
 
-#define DRM_INFO(fmt, arg...)  printk(KERN_INFO "[" DRM_NAME "] " fmt , ##arg)
+#define DRM_INFO(fmt, ...)				\
+	printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
 
 /**
  * Debug output.