fusl/src/mman/posix_madvise.c

#define _GNU_SOURCE
#include <sys/mman.h>
#include "syscall.h"

int posix_madvise(void* addr, size_t len, int advice) {
  if (advice == MADV_DONTNEED)
    return 0;
  return -__syscall(SYS_madvise, addr, len, advice);
}