Linux Cross Reference
Linux/fs/noquot.c

   /* noquot.c: Quota stubs necessary for when quotas are not
    *           compiled into the kernel.
    */
   
   #include <linux/kernel.h>
   #include <linux/types.h>
   #include <linux/errno.h>
   
   int nr_dquots, nr_free_dquots;
  int max_dquots;
  
  asmlinkage long sys_quotactl(int cmd, const char *special, int id, caddr_t addr)
  {
          return(-ENOSYS);
  }