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/**
@file
@brief Linux kernel memory management interface wrapper
@details Copyright (c) 2017-2018 Acronis International GmbH
@author Mikhail Krivtsov (mikhail.krivtsov@acronis.com)
@since $Id: $
*/
#pragma once
#include <linux/mm.h> // is_vmalloc_addr()
#include <linux/slab.h> // kmalloc(), kzalloc(), kfree()
#include <linux/vmalloc.h> // vmalloc(), vfree()
#define mem_alloc_with_alloc_flags(size, nowait) kmalloc(size, (nowait) ? (GFP_ATOMIC) : (GFP_KERNEL))
#define mem_alloc0_with_alloc_flags(size, nowait) kzalloc(size, (nowait) ? (GFP_ATOMIC) : (GFP_KERNEL))
#define mem_alloc(size) mem_alloc_with_alloc_flags(size, false)
#define mem_alloc0(size) mem_alloc0_with_alloc_flags(size, false)
#define mem_alloc_nowait(size) mem_alloc_with_alloc_flags(size, true)
#define mem_alloc0_nowait(size) mem_alloc0_with_alloc_flags(size, true)
#define mem_free(p) kfree(p)
static inline void *kvmalloc_compat(size_t size, gfp_t flags)
{
void *ret;
ret = kmalloc(size, flags | __GFP_NOWARN);
if (ret)
{
return ret;
}
return vmalloc(size);
}
static inline void kvfree_compat(void *addr)
{
if (is_vmalloc_addr(addr))
vfree(addr);
else
kfree(addr);
}
#define large_mem_alloc(size) kvmalloc_compat(size, GFP_KERNEL)
#define large_mem_free(p) kvfree_compat(p)
#define vmem_alloc(size) vmalloc(size)
#define vmem_free(p) vfree(p)