Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #define _GNU_SOURCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define __EXPORTED_HEADERS__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/memfd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <sys/syscall.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "common.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) int hugetlbfs_test = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  * Copied from mlock2-tests.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) unsigned long default_huge_page_size(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	unsigned long hps = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	char *line = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	size_t linelen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	FILE *f = fopen("/proc/meminfo", "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	if (!f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	while (getline(&line, &linelen, f) > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		if (sscanf(line, "Hugepagesize:       %lu kB", &hps) == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 			hps <<= 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	free(line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	fclose(f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	return hps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int sys_memfd_create(const char *name, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	if (hugetlbfs_test)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		flags |= MFD_HUGETLB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	return syscall(__NR_memfd_create, name, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }