Commit bd89bb29 authored by Arjan van de Ven's avatar Arjan van de Ven Committed by Ingo Molnar
Browse files

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



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: default avatarArjan van de Ven <arjan@linux.intel.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 74853dba

kernel/panic.c

+6 −0
Original line number Original line Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/debug_locks.h>

#include <linux/debug_locks.h>

#include <linux/random.h>

#include <linux/random.h>

#include <linux/kallsyms.h>

#include <linux/kallsyms.h>

#include <linux/dmi.h>





int panic_on_oops;

int panic_on_oops;

static unsigned long tainted_mask;

static unsigned long tainted_mask;
@@ -325,11 +326,16 @@ void warn_slowpath(const char *file, int line, const char *fmt, ...) 
	va_list args;

	va_list args;

	char function[KSYM_SYMBOL_LEN];

	char function[KSYM_SYMBOL_LEN];

	unsigned long caller = (unsigned long)__builtin_return_address(0);

	unsigned long caller = (unsigned long)__builtin_return_address(0);

	const char *board;



	sprint_symbol(function, caller);

	sprint_symbol(function, caller);





	printk(KERN_WARNING "------------[ cut here ]------------\n");

	printk(KERN_WARNING "------------[ cut here ]------------\n");

	printk(KERN_WARNING "WARNING: at %s:%d %s()\n", file,

	printk(KERN_WARNING "WARNING: at %s:%d %s()\n", file,

		line, function);

		line, function);

	board = dmi_get_system_info(DMI_PRODUCT_NAME);

	if (board)

		printk(KERN_WARNING "Hardware name: %s\n", board);





	if (fmt) {

	if (fmt) {

		va_start(args, fmt);

		va_start(args, fmt);

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