From: Heiko Carstens <hca@linux.ibm.com>
To: Alexander Gordeev <agordeev@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Peter Zijlstra <peterz@infradead.org>,
Mark Rutland <mark.rutland@arm.com>,
Arnd Bergmann <arnd@arndb.de>, Jens Remus <jremus@linux.ibm.com>,
Stefan Schulze Frielinghaus <stefansf@linux.ibm.com>,
Juergen Christ <jchrist@linux.ibm.com>
Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: [PATCH 7/9] s390/bug: Implement WARN_ONCE()
Date: Tue, 9 Dec 2025 13:16:59 +0100 [thread overview]
Message-ID: <20251209121701.1856271-8-hca@linux.ibm.com> (raw)
In-Reply-To: <20251209121701.1856271-1-hca@linux.ibm.com>
This is the s390 variant of commit 11bb4944f014 ("x86/bug: Implement
WARN_ONCE()").
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
arch/s390/include/asm/bug.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/s390/include/asm/bug.h b/arch/s390/include/asm/bug.h
index f3aca691bae2..e6e8b492c0e7 100644
--- a/arch/s390/include/asm/bug.h
+++ b/arch/s390/include/asm/bug.h
@@ -104,6 +104,17 @@ do { \
#define __WARN_printf(taint, fmt, arg...) \
__WARN_print_arg(BUGFLAG_TAINT(taint), fmt, ## arg)
+#define WARN_ONCE(cond, format, arg...) \
+({ \
+ int __ret_warn_on = !!(cond); \
+ \
+ if (unlikely(__ret_warn_on)) { \
+ __WARN_print_arg(BUGFLAG_ONCE|BUGFLAG_TAINT(TAINT_WARN),\
+ format, ## arg); \
+ } \
+ __ret_warn_on; \
+})
+
#define HAVE_ARCH_BUG
#define HAVE_ARCH_BUG_FORMAT
#define HAVE_ARCH_BUG_FORMAT_ARGS
--
2.51.0
next prev parent reply other threads:[~2025-12-09 12:17 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-09 12:16 [PATCH 0/9] s390: Exception based WARN() / WARN_ONCE() Heiko Carstens
2025-12-09 12:16 ` [PATCH 1/9] kbuild: Require gcc-9 for s390 Heiko Carstens
2025-12-09 12:16 ` [PATCH 2/9] s390/bug: Convert to inline assembly with input operands Heiko Carstens
2025-12-09 12:16 ` [PATCH 3/9] s390/bug: Use BUG_FORMAT for DEBUG_BUGVERBOSE_DETAILED Heiko Carstens
2025-12-09 12:16 ` [PATCH 4/9] s390/bug: Introduce and use monitor code macro Heiko Carstens
2025-12-09 12:16 ` [PATCH 5/9] s390/traps: Copy monitor code to pt_regs Heiko Carstens
2025-12-09 12:16 ` [PATCH 6/9] s390/bug: Implement __WARN_printf() Heiko Carstens
2025-12-09 12:35 ` Peter Zijlstra
2025-12-09 14:42 ` Heiko Carstens
2025-12-10 13:09 ` kernel test robot
2025-12-10 14:57 ` kernel test robot
2025-12-09 12:16 ` Heiko Carstens [this message]
2025-12-09 12:17 ` [PATCH 8/9] s390/bug: Skip __WARN_trap() in call traces Heiko Carstens
2025-12-09 12:17 ` [PATCH 9/9] s390/bug: Prevent tail-call optimization Heiko Carstens
2025-12-09 12:47 ` Peter Zijlstra
2025-12-09 12:56 ` [PATCH 0/9] s390: Exception based WARN() / WARN_ONCE() Peter Zijlstra
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