[PATCH] warn: print the DMI board info name in a WARN/WARN_ON

[Arjan van de Ven]

it's very useful for many low level WARN_ON's to find out which
motherboard has the broken BIOS etc... this patch adds a printk
to the WARN_ON code for this.
On architectures without DMI, gcc should optimize the code out.

Signed-off-by: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
---
 kernel/panic.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/kernel/panic.c b/kernel/panic.c
index 2b913aa..9c1b7e0 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -21,6 +21,7 @@
 #include <linux/debug_locks.h>
 #include <linux/random.h>
 #include <linux/kallsyms.h>
+#include <linux/dmi.h>
 
 int panic_on_oops;
 static unsigned long tainted_mask;
@@ -328,12 +329,16 @@ void warn_slowpath(const char *file, int line, const char *fmt, ...)
 {
 	va_list args;
 	char function[KSYM_SYMBOL_LEN];
+	const char *board;
 	unsigned long caller = (unsigned long)__builtin_return_address(0);
 	sprint_symbol(function, caller);
 
 	printk(KERN_WARNING "------------[ cut here ]------------\n");
 	printk(KERN_WARNING "WARNING: at %s:%d %s()\n", file,
 		line, function);
+	board = dmi_get_system_info(DMI_PRODUCT_NAME);
+	if (board)
+		printk(KERN_WARNING "Hardware name: %s\n", board);
 
 	if (fmt) {
 		va_start(args, fmt);
-- 
1.6.0.4




-- 
Arjan van de Ven 	Intel Open Source Technology Centre
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