[PATCH 2/5] bugs/core: Pass down the condition string of WARN_ON_ONCE(cond) warnings to __WARN_FLAGS()
From: Ingo Molnar
Date: Wed Mar 26 2025 - 04:49:10 EST
This will allow architecture code to print out this information.
The format of the string is '[condition]', for example:
WARN_ON_ONCE(idx < 0 && ptr);
Will get the '[idx < 0 && ptr]' string literal passed down as 'cond_str'
in __WARN_FLAGS().
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
include/asm-generic/bug.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index af76e4a04b16..c8e7126bc26e 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -110,7 +110,7 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...);
#define WARN_ON_ONCE(condition) ({ \
int __ret_warn_on = !!(condition); \
if (unlikely(__ret_warn_on)) \
- __WARN_FLAGS("", \
+ __WARN_FLAGS("["#condition"] ", \
BUGFLAG_ONCE | \
BUGFLAG_TAINT(TAINT_WARN)); \
unlikely(__ret_warn_on); \
--
2.45.2