[lttng-modules.git] / include / wrapper / page_alloc.h

/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
 *
 * wrapper/page_alloc.h
 *
 * wrapper around get_pfnblock_flags_mask. Using KALLSYMS to get its address
 * when available, else we need to have a kernel that exports this function to
 * GPL modules.
 *
 * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#ifndef _LTTNG_WRAPPER_PAGE_ALLOC_H
#define _LTTNG_WRAPPER_PAGE_ALLOC_H

#include <linux/mm_types.h>

/*
 * We need to redefine get_pfnblock_flags_mask to our wrapper, because
 * the get_pageblock_migratetype() macro uses it.
 */
#ifdef CONFIG_KALLSYMS

#define get_pfnblock_flags_mask		wrapper_get_pfnblock_flags_mask

int wrapper_get_pfnblock_flags_mask_init(void);

#else

static inline
int wrapper_get_pfnblock_flags_mask_init(void)
{
	return 0;
}

#endif

#endif /* _LTTNG_WRAPPER_PAGE_ALLOC_H */
Commit	Line	Data
	1	/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
	2	*
	3	* wrapper/page_alloc.h
	4	*
	5	* wrapper around get_pfnblock_flags_mask. Using KALLSYMS to get its address
	6	* when available, else we need to have a kernel that exports this function to
	7	* GPL modules.
	8	*
	9	* Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	10	*/
	11
	12	#ifndef _LTTNG_WRAPPER_PAGE_ALLOC_H
	13	#define _LTTNG_WRAPPER_PAGE_ALLOC_H
	14
	15	#include <linux/mm_types.h>
	16
	17	/*
	18	* We need to redefine get_pfnblock_flags_mask to our wrapper, because
	19	* the get_pageblock_migratetype() macro uses it.
	20	*/
	21	#ifdef CONFIG_KALLSYMS
	22
	23	#define get_pfnblock_flags_mask wrapper_get_pfnblock_flags_mask
	24
	25	int wrapper_get_pfnblock_flags_mask_init(void);
	26
	27	#else
	28
	29	static inline
	30	int wrapper_get_pfnblock_flags_mask_init(void)
	31	{
	32	return 0;
	33	}
	34
	35	#endif
	36
	37	#endif /* _LTTNG_WRAPPER_PAGE_ALLOC_H */