[patch] udb_printf() formatting attribute

[Jimi Xenidis]

This patch allows the compiler to catch any printf-like mismatches  
for udbg_printf().
After some brute force building I've only found issues with my own  
code and lparcfg.c
It could break some developers, but IMHO that would be goodness.

Signed-off-by: Jimi Xenidis <jimix at watson.ibm.com>
---
diff -r 0163968f7fce arch/powerpc/kernel/lparcfg.c
--- a/arch/powerpc/kernel/lparcfg.c	Tue May 16 15:55:19 2006 -0400
+++ b/arch/powerpc/kernel/lparcfg.c	Wed May 17 10:43:55 2006 -0400
@@ -521,10 +521,10 @@ static ssize_t lparcfg_write(struct file
	current_weight = (resource >> 5 * 8) & 0xFF;
-	pr_debug("%s: current_entitled = %lu, current_weight = %lu\n",
+	pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
		 __FUNCTION__, current_entitled, current_weight);
-	pr_debug("%s: new_entitled = %lu, new_weight = %lu\n",
+	pr_debug("%s: new_entitled = %lu, new_weight = %u\n",
		 __FUNCTION__, *new_entitled_ptr, *new_weight_ptr);
	retval = plpar_hcall_norets(H_SET_PPP, *new_entitled_ptr,
diff -r 0163968f7fce include/asm-powerpc/udbg.h
--- a/include/asm-powerpc/udbg.h	Tue May 16 15:55:19 2006 -0400
+++ b/include/asm-powerpc/udbg.h	Wed May 17 10:43:55 2006 -0400
@@ -23,7 +23,8 @@ extern int udbg_read(char *buf, int bufl
extern int udbg_read(char *buf, int buflen);
extern void register_early_udbg_console(void);
-extern void udbg_printf(const char *fmt, ...);
+extern void udbg_printf(const char *fmt, ...)
+	__attribute__ ((format (printf, 1, 2)));
extern void udbg_progress(char *s, unsigned short hex);
extern void udbg_init_uart(void __iomem *comport, unsigned int speed,