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/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
*
* wrapper/mm.h
*
* Copyright (C) 2018 Francis Deslauriers <francis.deslauriers@efficios.com>
*/
#ifndef _LTTNG_WRAPPER_MM_H
#define _LTTNG_WRAPPER_MM_H
#include <linux/mm.h>
#include <linux/oom.h>
#include <lttng/kernel-version.h>
#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(6,3,0) || \
LTTNG_RHEL_KERNEL_RANGE(5,14,0,452,0,0, 5,15,0,0,0,0))
static inline
void wrapper_vm_flags_set(struct vm_area_struct *vma,
vm_flags_t flags)
{
vm_flags_set(vma, flags);
}
#else
static inline
void wrapper_vm_flags_set(struct vm_area_struct *vma,
vm_flags_t flags)
{
vma->vm_flags |= flags;
}
#endif
#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0) \
|| LTTNG_UBUNTU_KERNEL_RANGE(4,4,25,44, 4,5,0,0))
/*
* Returns true if the current estimation of the number of page available is
* larger than the number of pages passed as parameter.
*/
static inline
bool wrapper_check_enough_free_pages(unsigned long num_pages)
{
return num_pages < si_mem_available();
}
#else
static inline
bool wrapper_check_enough_free_pages(unsigned long num_pages)
{
/*
* The si_mem_available function is not available on this kernel. Since
* we can't reliably know if there is enough memory available, so we
* return true.
*/
return true;
}
#endif
#endif /* _LTTNG_WRAPPER_MM_H */
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