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: Arjan van de Ven <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
stawel · Nov 28, 2008 · bd89bb2 · bd89bb2
1 parent 74853db
commit bd89bb2
Showing 1 changed file with 6 additions and 0 deletions.
diff --git 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;
@@ -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);