device.h drivers/base/core.c Convert dev_<level> logging macros to functions

Reduces an x86 defconfig text and data ~55k, .6% smaller.

$ size vmlinux*
   text	   data	    bss	    dec	    hex	filename
7205273	 716016	1366288	9287577	 8db799	vmlinux
7258890	 719768	1366288	9344946	 8e97b2	vmlinux.master

Uses %pV and struct va_format
Format arguments are verified before printk

The dev_info macro is converted to _dev_info because there are
existing uses of variables named dev_info in the kernel tree
like drivers/net/pcmcia/pcnet_cs.c

A dev_info macro is created to call _dev_info

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 64 insertions, 0 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 9630fbdf4e6..38bbbd02930 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1819,3 +1819,67 @@ void device_shutdown(void)
 	spin_unlock(&devices_kset->list_lock);
 	async_synchronize_full();
 }
+
+/*
+ * Device logging functions
+ */
+
+#ifdef CONFIG_PRINTK
+
+static int __dev_printk(const char *level, const struct device *dev,
+			struct va_format *vaf)
+{
+	if (!dev)
+		return printk("%s(NULL device *): %pV", level, vaf);
+
+	return printk("%s%s %s: %pV",
+		      level, dev_driver_string(dev), dev_name(dev), vaf);
+}
+
+int dev_printk(const char *level, const struct device *dev,
+	       const char *fmt, ...)
+{
+	struct va_format vaf;
+	va_list args;
+	int r;
+
+	va_start(args, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	r = __dev_printk(level, dev, &vaf);
+	va_end(args);
+
+	return r;
+}
+EXPORT_SYMBOL(dev_printk);
+
+#define define_dev_printk_level(func, kern_level)		\
+int func(const struct device *dev, const char *fmt, ...)	\
+{								\
+	struct va_format vaf;					\
+	va_list args;						\
+	int r;							\
+								\
+	va_start(args, fmt);					\
+								\
+	vaf.fmt = fmt;						\
+	vaf.va = &args;						\
+								\
+	r = __dev_printk(kern_level, dev, &vaf);		\
+	va_end(args);						\
+								\
+	return r;						\
+}								\
+EXPORT_SYMBOL(func);
+
+define_dev_printk_level(dev_emerg, KERN_EMERG);
+define_dev_printk_level(dev_alert, KERN_ALERT);
+define_dev_printk_level(dev_crit, KERN_CRIT);
+define_dev_printk_level(dev_err, KERN_ERR);
+define_dev_printk_level(dev_warn, KERN_WARNING);
+define_dev_printk_level(dev_notice, KERN_NOTICE);
+define_dev_printk_level(_dev_info, KERN_INFO);
+
+#endif