On Thursday 27 November 2008, Johannes Berg wrote:

On Wed, 2008-11-26 at 15:07 -0800, Inaky Perez-Gonzalez wrote:

quoted

This file contains a simple debug framework that is used in the stack;

                       ^^^^^ ??

quoted

it allows the debug level to be controlled at compile-time (so the
debug code is optimized out) and at run-time (for what wasn't compiled
out).

Recently we got new stuff for dynamic printk
(include/linux/dynamic_printk.h) and pr_debug with a start format
(include/linux/kernel.h, pr_fmt); can you use any of that to make this
smaller? If not, I think you ought to argue why not, and possibly
improve the generic facility.

Yep, it was just too recent. I hadn't noticed it and I was told about
it a week ago. I just need to map it. It's on my plan to change it,
but I don't know if I'll have to do it for the push.

Personally, I'm tired of seeing every Intel driver come with a new huge
set of debugging macros that are barely understandable.

me too -- I am glad there is finally a common facility in the kernel
for it. 

quoted

+#define _d_printf(l, tag, dev, f, a...)					\
+do {									\
+	char head[64];							\
+	if (!d_test(l))							\
+		break;							\
+	__d_head(head, sizeof(head), dev);				\
+	printk(KERN_ERR "%s%s%s: " f, head, __func__, tag, ##a);	\
+} while (0 && dev)

That && dev is wrong.

Another remnant from a previous implementation -- killed, thanks

-- 
Inaky