Re: [PATCH] fix dev_printk to work even in the absence of am attached driver

[James Bottomley <James.Bottomley@steeleye.com>]

On Thu, 2004-04-22 at 17:07, Greg KH wrote: 
> But doesn't this cause the string "(unbound)" to be created for every
> dev_printk() call in the code?  I don't think gcc can optimize that very
> well.  How about making a global string just for that, otherwise the
> size police will come after me for adding such a patch :)

OK, I can't find an elegant way of making it global, so I think the best
thing to do is just leave it blank for no driver (gcc can optimise that
case). 

James 

===== include/linux/device.h 1.117 vs edited =====
--- 1.117/include/linux/device.h	Mon Apr 12 12:54:25 2004
+++ edited/include/linux/device.h	Tue May 11 08:58:44 2004
@@ -400,7 +400,7 @@
 
 /* debugging and troubleshooting/diagnostic helpers. */
 #define dev_printk(level, dev, format, arg...)	\
-	printk(level "%s %s: " format , (dev)->driver->name , (dev)->bus_id , ## arg)
+	printk(level "%s %s: " format , (dev)->driver ? (dev)->driver->name : "" , (dev)->bus_id , ## arg)
 
 #ifdef DEBUG
 #define dev_dbg(dev, format, arg...)		\