Commit 687fac9d authored by Ingo Molnar's avatar Ingo Molnar
Browse files

bugs/core: Introduce the CONFIG_DEBUG_BUGVERBOSE_DETAILED Kconfig switch 



Allow configurability of the inclusion of more detailed
WARN_ON() strings, to be implemented in subsequent
commits.

Since the full cost will be around 100K more memory on
an x86 defconfig, disable it by default.

Provide the WARN_CONDITION_STR() macro to allow the conditional
passing of extra strings to lower level BUG/WARN handlers.

Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Acked-by: default avatarPeter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/r/20250515124644.2958810-4-mingo@kernel.org
parent 3bc3c9c3

include/asm-generic/bug.h

+6 −0
Original line number Diff line number Diff line
@@ -17,6 +17,12 @@ 
#define BUG_GET_TAINT(bug)	((bug)->flags >> 8)

#endif



#ifdef CONFIG_DEBUG_BUGVERBOSE_DETAILED

# define WARN_CONDITION_STR(cond_str) cond_str

#else

# define WARN_CONDITION_STR(cond_str)

#endif



#ifndef __ASSEMBLY__

#include <linux/panic.h>

#include <linux/printk.h>

lib/Kconfig.debug

+10 −0
Original line number Diff line number Diff line
@@ -206,6 +206,16 @@ config DEBUG_BUGVERBOSE 
	  of the BUG call as well as the EIP and oops trace.  This aids

	  debugging but costs about 70-100K of memory.



config DEBUG_BUGVERBOSE_DETAILED

	bool "Verbose WARN_ON_ONCE() reporting (adds 100K)" if DEBUG_BUGVERBOSE

	help

	  Say Y here to make WARN_ON_ONCE() output the condition string of the

	  warning, in addition to the file name and line number.

	  This helps debugging, but costs about 100K of memory.



	  Say N if unsure.





endmenu # "printk and dmesg options"



config DEBUG_KERNEL