[PATCH 7/9] s390/bug: Implement WARN_ONCE()
From: Heiko Carstens
Date: Tue Dec 09 2025 - 07:18:04 EST
This is the s390 variant of commit 11bb4944f014 ("x86/bug: Implement
WARN_ONCE()").
Signed-off-by: Heiko Carstens <hca@xxxxxxxxxxxxx>
---
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