fix backport: block: add a disk_uevent helper (v5.12)

[lttng-modules.git] / lib / bug.h

/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
 *
 * lib/bug.h
 *
 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#ifndef _LTTNG_BUG_H
#define _LTTNG_BUG_H

#include <lttng-kernel-version.h>

#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(2,6,38))
#define LTTNG_BUILD_BUG_ON(cond) BUILD_BUG_ON(cond)
#else
#define LTTNG_BUILD_BUG_ON(cond) MAYBE_BUILD_BUG_ON(cond)
#endif

/**
 * BUILD_RUNTIME_BUG_ON - check condition at build (if constant) or runtime
 * @condition: the condition which should be false.
 *
 * If the condition is a constant and true, the compiler will generate a build
 * error. If the condition is not constant, a BUG will be triggered at runtime
 * if the condition is ever true. If the condition is constant and false, no
 * code is emitted.
 */
#define BUILD_RUNTIME_BUG_ON(condition)				\
	do {							\
		if (__builtin_constant_p(condition))		\
			LTTNG_BUILD_BUG_ON(condition);		\
		else						\
			BUG_ON(condition);			\
	} while (0)

#endif