[lttng-modules.git] / wrapper / compiler_attributes.h

/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
 *
 * wrapper/compiler_attributes.h
 *
 * Copyright (C) 2021 Michael Jeanson <mjeanson@efficios.com>
 */

#ifndef _LTTNG_WRAPPER_COMPILER_ATTRIBUTES_H
#define _LTTNG_WRAPPER_COMPILER_ATTRIBUTES_H

#include <lttng-kernel-version.h>

#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,20,0))
#include <linux/compiler_attributes.h>
#endif

#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,4,0))

/*
 * Use the kernel provided fallthrough attribute macro.
 */
#define lttng_fallthrough fallthrough

#else /* LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,4,0) */

/*
 * Fallback to the comment for kernels pre 5.15 that don't build with
 * '-Wimplicit-fallthrough=5'.
 */
#define lttng_fallthrough do {} while (0)  /* fallthrough */

#endif /* LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,4,0) */

#endif /* _LTTNG_WRAPPER_COMPILER_ATTRIBUTES_H */
Commit	Line	Data
1d00109f MJ	1	/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
	2	*
	3	* wrapper/compiler_attributes.h
	4	*
	5	* Copyright (C) 2021 Michael Jeanson <mjeanson@efficios.com>
	6	*/
	7
	8	#ifndef _LTTNG_WRAPPER_COMPILER_ATTRIBUTES_H
	9	#define _LTTNG_WRAPPER_COMPILER_ATTRIBUTES_H
	10
	11	#include <lttng-kernel-version.h>
	12
	13	#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,20,0))
	14	#include <linux/compiler_attributes.h>
	15	#endif
	16
	17	#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,4,0))
	18
	19	/*
	20	* Use the kernel provided fallthrough attribute macro.
	21	*/
	22	#define lttng_fallthrough fallthrough
	23
	24	#else /* LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,4,0) */
	25
	26	/*
	27	* Fallback to the comment for kernels pre 5.15 that don't build with
	28	* '-Wimplicit-fallthrough=5'.
	29	*/
	30	#define lttng_fallthrough do {} while (0) /* fallthrough */
	31
	32	#endif /* LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,4,0) */
	33
	34	#endif /* _LTTNG_WRAPPER_COMPILER_ATTRIBUTES_H */