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.
Showing the changes to kernel/panic.c (1 of 1 file). Show all
Unified · Split
| @@ -21,6 +21,7 @@ · 20 unmodified lines | |||
| 21 | #include <linux/debug_locks.h> | 21 | #include <linux/debug_locks.h> |
| 22 | #include <linux/random.h> | 22 | #include <linux/random.h> |
| 23 | #include <linux/kallsyms.h> | 23 | #include <linux/kallsyms.h> |
| 24 | #include <linux/dmi.h> | ||
| 24 | 25 | ||
| 25 | int panic_on_oops; | 26 | int panic_on_oops; |
| 26 | static unsigned long tainted_mask; | 27 | static unsigned long tainted_mask; |
| @@ -325,11 +326,16 @@ void warn_slowpath(const char *file, int line, const char *fmt, ...) · 298 unmodified lines | |||
| 325 | va_list args; | 326 | va_list args; |
| 326 | char function[KSYM_SYMBOL_LEN]; | 327 | char function[KSYM_SYMBOL_LEN]; |
| 327 | unsigned long caller = (unsigned long)__builtin_return_address(0); | 328 | unsigned long caller = (unsigned long)__builtin_return_address(0); |
| 329 | const char *board; | ||
| 330 | |||
| 328 | sprint_symbol(function, caller); | 331 | sprint_symbol(function, caller); |
| 329 | 332 | ||
| 330 | printk(KERN_WARNING "------------[ cut here ]------------\n"); | 333 | printk(KERN_WARNING "------------[ cut here ]------------\n"); |
| 331 | printk(KERN_WARNING "WARNING: at %s:%d %s()\n", file, | 334 | printk(KERN_WARNING "WARNING: at %s:%d %s()\n", file, |
| 332 | line, function); | 335 | line, function); |
| 336 | board = dmi_get_system_info(DMI_PRODUCT_NAME); | ||
| 337 | if (board) | ||
| 338 | printk(KERN_WARNING "Hardware name: %s\n", board); | ||
| 333 | 339 | ||
| 334 | if (fmt) { | 340 | if (fmt) { |
| 335 | va_start(args, fmt); | 341 | va_start(args, fmt); |