Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#define __EXPORTED_HEADERS__
 
#include <stdio.h>
#include <stdlib.h>
#include <linux/fcntl.h>
#include <linux/memfd.h>
#include <unistd.h>
#include <sys/syscall.h>
 
#include "common.h"
 
int hugetlbfs_test = 0;
 
/*
 * Copied from mlock2-tests.c
 */
unsigned long default_huge_page_size(void)
{
<------>unsigned long hps = 0;
<------>char *line = NULL;
<------>size_t linelen = 0;
<------>FILE *f = fopen("/proc/meminfo", "r");
 
<------>if (!f)
<------><------>return 0;
<------>while (getline(&line, &linelen, f) > 0) {
<------><------>if (sscanf(line, "Hugepagesize:       %lu kB", &hps) == 1) {
<------><------><------>hps <<= 10;
<------><------><------>break;
<------><------>}
<------>}
 
<------>free(line);
<------>fclose(f);
<------>return hps;
}
 
int sys_memfd_create(const char *name, unsigned int flags)
{
<------>if (hugetlbfs_test)
<------><------>flags |= MFD_HUGETLB;
 
<------>return syscall(__NR_memfd_create, name, flags);
}