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debug warnings: print the DMI board info name in a WARN/WARN_ON

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Impact: extend WARN_ON() output with DMI_PRODUCT_NAME

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@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arjan van de Ven 2008-11-28 08:36:09 -08:00 committed by Ingo Molnar
parent 74853dba2f
commit bd89bb29a0
1 changed files with 6 additions and 0 deletions
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6
kernel/panic.c
View file

@ -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;
@ -325,11 +326,16 @@ void warn_slowpath(const char *file, int line, const char *fmt, ...)
va_list args;
char function[KSYM_SYMBOL_LEN];
unsigned long caller = (unsigned long)__builtin_return_address(0);
const char *board;
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);