Make this backwards compatible with older Linux kernels

diff --git a/libpcsxcore/lightrec/mem.c b/libpcsxcore/lightrec/mem.c
index c7fa7da..c3a1421 100644 (file)
--- a/libpcsxcore/lightrec/mem.c
+++ b/libpcsxcore/lightrec/mem.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2022 Paul Cercueil <paul@crapouillou.net>
  */
 
+#define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
 #include <stdbool.h>
@@ -11,6 +12,7 @@
 #include <sys/mman.h>
 #include <sys/shm.h>
 #include <sys/stat.h>
+#include <sys/syscall.h>
 #include <unistd.h>
 
 #include "../psxhw.h"
@@ -68,7 +70,8 @@ static int lightrec_mmap_ram(bool hugetlb)
        if (hugetlb)
                flags |= MFD_HUGETLB;
 
-       memfd = memfd_create("/lightrec_memfd", flags);
+        memfd = syscall(SYS_memfd_create, "/lightrec_memfd",
+                       flags);
        if (memfd < 0) {
                err = -errno;
                fprintf(stderr, "Failed to create memfd: %d\n", err);
@@ -124,9 +127,7 @@ int lightrec_init_mmap(void)
        unsigned int i;
        uintptr_t base;
        void *map;
-       int err;
-
-       err = lightrec_mmap_ram(true);
+       int err = lightrec_mmap_ram(true);
        if (err) {
                err = lightrec_mmap_ram(false);
                if (err) {