[PATCH 2/2] drm: Simplify drm_printk to reduce object size quite a bit

[Joe Perches]

Remove function name and special " *ERROR*" from argument list

$ size drivers/gpu/drm/built-in.o* (x86-32 defconfig, most drm selected)
   text    data     bss     dec     hex filename
5635366  182579   14328 5832273  58fe51 drivers/gpu/drm/built-in.o.new
5779552  182579   14328 5976459  5b318b drivers/gpu/drm/built-in.o.old

Using "%ps", __builtin_return_address(0) is the same as "%s", __func__
except for static inlines, but it's more or less the same output.

Miscellanea:

o Convert args... to ##__VA_ARGS__
o The equivalent DRM_DEV_<FOO> macros are rarely used and not
  worth conversion

Signed-off-by: Joe Perches <j...@perches.com>
---
 drivers/gpu/drm/drm_drv.c |  5 +++--
 include/drm/drmP.h        | 30 ++++++++++++++----------------
 2 files changed, 17 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 80c7f25b5b74..6efdba4993fc 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -89,7 +89,6 @@ void drm_dev_printk(const struct device *dev, const char 
*level,
 EXPORT_SYMBOL(drm_dev_printk);
 
 void drm_printk(const char *level, unsigned int category,
-               const char *function_name, const char *prefix,
                const char *format, ...)
 {
        struct va_format vaf;
@@ -102,7 +101,9 @@ void drm_printk(const char *level, unsigned int category,
        vaf.fmt = format;
        vaf.va = &args;
 
-       printk("%s" DRM_PRINTK_FMT, level, function_name, prefix, &vaf);
+       printk("%s" "[" DRM_NAME ":%ps]%s %pV",
+              level, __builtin_return_address(0),
+              strcmp(level, KERN_ERR) == 0 ? " *ERROR*" : "", &vaf);
 
        va_end(args);
 }
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 95cd04aa9bf7..4729c543d877 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -140,9 +140,8 @@ void drm_dev_printk(const struct device *dev, const char 
*level,
                    unsigned int category, const char *function_name,
                    const char *prefix, const char *format, ...);
 
-extern __printf(5, 6)
+extern __printf(3, 4)
 void drm_printk(const char *level, unsigned int category,
-               const char *function_name, const char *prefix,
                const char *format, ...);
 
 /***********************************************************************/
@@ -198,8 +197,7 @@ void drm_printk(const char *level, unsigned int category,
        drm_dev_printk(dev, KERN_ERR, DRM_UT_NONE, __func__, " *ERROR*",\
                       fmt, ##__VA_ARGS__)
 #define DRM_ERROR(fmt, ...)                                            \
-       drm_printk(KERN_ERR, DRM_UT_NONE, __func__, " *ERROR*", fmt,    \
-                  ##__VA_ARGS__)
+       drm_printk(KERN_ERR, DRM_UT_NONE, fmt,  ##__VA_ARGS__)
 
 /**
  * Rate limited error output.  Like DRM_ERROR() but won't flood the log.
@@ -241,38 +239,38 @@ void drm_printk(const char *level, unsigned int category,
 #define DRM_DEV_DEBUG(dev, fmt, args...)                               \
        drm_dev_printk(dev, KERN_DEBUG, DRM_UT_CORE, __func__, "", fmt, \
                       ##args)
-#define DRM_DEBUG(fmt, args...)                                                
\
-       drm_printk(KERN_DEBUG, DRM_UT_CORE, __func__, "", fmt, ##args)
+#define DRM_DEBUG(fmt, ...)                                            \
+       drm_printk(KERN_DEBUG, DRM_UT_CORE, fmt, ##__VA_ARGS__)
 
 #define DRM_DEV_DEBUG_DRIVER(dev, fmt, args...)                                
\
        drm_dev_printk(dev, KERN_DEBUG, DRM_UT_DRIVER, __func__, "",    \
                       fmt, ##args)
-#define DRM_DEBUG_DRIVER(fmt, args...)                                 \
-       drm_printk(KERN_DEBUG, DRM_UT_DRIVER, __func__, "", fmt, ##args)
+#define DRM_DEBUG_DRIVER(fmt, ...)                                     \
+       drm_printk(KERN_DEBUG, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
 
 #define DRM_DEV_DEBUG_KMS(dev, fmt, args...)                           \
        drm_dev_printk(dev, KERN_DEBUG, DRM_UT_KMS, __func__, "", fmt,  \
                       ##args)
-#define DRM_DEBUG_KMS(fmt, args...)                                    \
-       drm_printk(KERN_DEBUG, DRM_UT_KMS, __func__, "", fmt, ##args)
+#define DRM_DEBUG_KMS(fmt, ...)                                        \
+       drm_printk(KERN_DEBUG, DRM_UT_KMS, fmt, ##__VA_ARGS__)
 
 #define DRM_DEV_DEBUG_PRIME(dev, fmt, args...)                         \
        drm_dev_printk(dev, KERN_DEBUG, DRM_UT_PRIME, __func__, "",     \
                       fmt, ##args)
-#define DRM_DEBUG_PRIME(fmt, args...)                                  \
-       drm_printk(KERN_DEBUG, DRM_UT_PRIME, __func__, "", fmt, ##args)
+#define DRM_DEBUG_PRIME(fmt, ...)                                      \
+       drm_printk(KERN_DEBUG, DRM_UT_PRIME, fmt, ##__VA_ARGS__)
 
 #define DRM_DEV_DEBUG_ATOMIC(dev, fmt, args...)                                
\
        drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ATOMIC, __func__, "",    \
                       fmt, ##args)
-#define DRM_DEBUG_ATOMIC(fmt, args...)                                 \
-       drm_printk(KERN_DEBUG, DRM_UT_ATOMIC, __func__, "", fmt, ##args)
+#define DRM_DEBUG_ATOMIC(fmt, ...)                                     \
+       drm_printk(KERN_DEBUG, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
 
 #define DRM_DEV_DEBUG_VBL(dev, fmt, args...)                           \
        drm_dev_printk(dev, KERN_DEBUG, DRM_UT_VBL, __func__, "", fmt,  \
                       ##args)
-#define DRM_DEBUG_VBL(fmt, args...)                                    \
-       drm_printk(KERN_DEBUG, DRM_UT_VBL, __func__, "", fmt, ##args)
+#define DRM_DEBUG_VBL(fmt, ...)                                        \
+       drm_printk(KERN_DEBUG, DRM_UT_VBL, fmt, ##__VA_ARGS__)
 
 #define _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, level, fmt, args...)    \
 ({                                                                     \
-- 
2.10.0.rc2.1.g053435c