My first attempt at building a linked list in C that actually compiles and works

ll.c

#include <stdlib.h>
#include <stdio.h>
#include "ll.h"

LL *createlist(int item)
{
  LL *it = malloc(sizeof(LL));
  it->val = item;
  printf("creating new LL@%p whose value is %d\n", it, item);
  return it;
}

int push(LL **thelist, int item)
{
  printf("pushing %d onto front of %p\n", item, *thelist);
  LL *it = createlist(item);
  printf("new address should be %p\n", it);
  LL *temp = *thelist;
  *thelist = it;
  it->next = temp;
  printf("new address is %p\n", *thelist);
  return 1;
}

int main() 
{
  LL *it = createlist(500);
  printf("*it address: %p\n", it);
  printf("it->val:     %d\n", it->val);
  push(&it, 600);
  printf("*it address: %p\n", it);
  printf("it->val:     %d\n", it->val);
  printf("it->next->val %d\n", it->next->val);
  return 0;
}

ll.h

typedef struct listnode
{
  int val;
  struct listnode *next;
} LL;

/*
int append(LL*, int);

int getval(LL*, int);

LL *createlist(int);
*/