tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
x86/bug: Implement WARN_ONCE()
Implement WARN_ONCE like WARN using BUGFLAG_ONCE.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20251110115758.339309119@infradead.org
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arch/x86/include/asm/bug.h
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arch/x86/include/asm/bug.h
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#define __WARN_printf(taint, fmt, arg...) \
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__WARN_print_arg(BUGFLAG_TAINT(taint), fmt, ## arg)
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#define WARN_ONCE(cond, format, arg...) ({ \
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int __ret_warn_on = !!(cond); \
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if (unlikely(__ret_warn_on)) { \
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__WARN_print_arg(BUGFLAG_ONCE|BUGFLAG_TAINT(TAINT_WARN),\
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format, ## arg); \
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} \
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__ret_warn_on; \
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})
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#endif /* HAVE_ARCH_BUG_FORMAT_ARGS */
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#include <asm-generic/bug.h>
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include/asm-generic/bug.h
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include/asm-generic/bug.h
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DO_ONCE_LITE_IF(condition, WARN_ON, 1)
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#endif
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#ifndef WARN_ONCE
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#define WARN_ONCE(condition, format...) \
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DO_ONCE_LITE_IF(condition, WARN, 1, format)
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#endif
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#define WARN_TAINT_ONCE(condition, taint, format...) \
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DO_ONCE_LITE_IF(condition, WARN_TAINT, 1, taint, format)