Commit 11bb4944 authored by Peter Zijlstra's avatar Peter Zijlstra
Browse files

x86/bug: Implement WARN_ONCE() 



Implement WARN_ONCE like WARN using BUGFLAG_ONCE.

Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20251110115758.339309119@infradead.org
parent 5b472b6e

arch/x86/include/asm/bug.h

+9 −0
Original line number Diff line number Diff line
@@ -178,6 +178,15 @@ 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;							\

})



#endif /* HAVE_ARCH_BUG_FORMAT_ARGS */



#include <asm-generic/bug.h>

include/asm-generic/bug.h

+2 −0
Original line number Diff line number Diff line
@@ -180,8 +180,10 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...); 
	DO_ONCE_LITE_IF(condition, WARN_ON, 1)

#endif



#ifndef WARN_ONCE

#define WARN_ONCE(condition, format...)				\

	DO_ONCE_LITE_IF(condition, WARN, 1, format)

#endif



#define WARN_TAINT_ONCE(condition, taint, format...)		\

	DO_ONCE_LITE_IF(condition, WARN_TAINT, 1, taint, format)