linux-kernel - [PATCH 09/14] bugs/s390: Pass in 'cond_str' to __EMIT

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Message-ID: <20250327102953.813608-10-mingo@kernel.org>
Date: Thu, 27 Mar 2025 11:29:48 +0100
From: Ingo Molnar <mingo@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH 09/14] bugs/s390: Pass in 'cond_str' to __EMIT_BUG()

Pass in the condition string from __WARN_FLAGS(), but do not
concatenate it with __FILE__, because the __bug_table is
apparently indexed by 16 bits and increasing string size
overflows it on defconfig builds.

Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: Heiko Carstens <hca@...ux.ibm.com>
Cc: Vasily Gorbik <gor@...ux.ibm.com>
Cc: Alexander Gordeev <agordeev@...ux.ibm.com>
Cc: Christian Borntraeger <borntraeger@...ux.ibm.com>
Cc: Sven Schnelle <svens@...ux.ibm.com>
Cc: linux-s390@...r.kernel.org
Cc: <linux-arch@...r.kernel.org>
---
 arch/s390/include/asm/bug.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/s390/include/asm/bug.h b/arch/s390/include/asm/bug.h
index ef3e495ec1e3..30f8785a01f5 100644
--- a/arch/s390/include/asm/bug.h
+++ b/arch/s390/include/asm/bug.h
@@ -8,7 +8,7 @@
 
 #ifdef CONFIG_DEBUG_BUGVERBOSE
 
-#define __EMIT_BUG(x) do {					\
+#define __EMIT_BUG(cond_str, x) do {				\
 	asm_inline volatile(					\
 		"0:	mc	0,0\n"				\
 		".section .rodata.str,\"aMS\",@progbits,1\n"	\
@@ -27,7 +27,7 @@
 
 #else /* CONFIG_DEBUG_BUGVERBOSE */
 
-#define __EMIT_BUG(x) do {					\
+#define __EMIT_BUG(cond_str, x) do {				\
 	asm_inline volatile(					\
 		"0:	mc	0,0\n"				\
 		".section __bug_table,\"aw\"\n"			\
@@ -42,12 +42,12 @@
 #endif /* CONFIG_DEBUG_BUGVERBOSE */
 
 #define BUG() do {					\
-	__EMIT_BUG(0);					\
+	__EMIT_BUG("", 0);				\
 	unreachable();					\
 } while (0)
 
 #define __WARN_FLAGS(cond_str, flags) do {		\
-	__EMIT_BUG(BUGFLAG_WARNING|(flags));		\
+	__EMIT_BUG(cond_str, BUGFLAG_WARNING|(flags));	\
 } while (0)
 
 #define WARN_ON(x) ({					\
-- 
2.45.2