Stack using Linked List

struct Stack
{
    int Data;
    struct Stack *next;
}*top;

void popStack()
{
    struct Stack *temp = top;
    if(temp == NULL)
        printf("\nStack Empty")
    else{
        top = top->next;
        free(temp);
    }
}

void pushStack(int value)
{
    struct Stack *temp;
    temp=(struct Stack *)malloc(sizeof(Stack Node));
    temp->Data=value;
    if (top == NULL)
    {
         top=temp;
         top->next=NULL;
    }
    else
    {
        temp->next=top;
        top=temp;
    }
}

void display()
{
     struct Stack *var=top;
     if(var == NULL)
         printf("Stack is Empty");
     else
     { 
          while(var!=NULL) {
               printf("%d \n",var->Data);
               var=var->next;
          } 
     }

}