-static void copy_fdtable(struct fdtable *nfdt, struct fdtable *fdt)
-{
- int i;
- int count;
-
- BUG_ON(nfdt->max_fdset < fdt->max_fdset);
- BUG_ON(nfdt->max_fds < fdt->max_fds);
- /* Copy the existing tables and install the new pointers */
-
- i = fdt->max_fdset / (sizeof(unsigned long) * 8);
- count = (nfdt->max_fdset - fdt->max_fdset) / 8;
-
- /*
- * Don't copy the entire array if the current fdset is
- * not yet initialised.
- */
- if (i) {
- memcpy (nfdt->open_fds, fdt->open_fds,
- fdt->max_fdset/8);
- memcpy (nfdt->close_on_exec, fdt->close_on_exec,
- fdt->max_fdset/8);
- memset (&nfdt->open_fds->fds_bits[i], 0, count);
- memset (&nfdt->close_on_exec->fds_bits[i], 0, count);
- }
-
- /* Don't copy/clear the array if we are creating a new
- fd array for fork() */
- if (fdt->max_fds) {
- memcpy(nfdt->fd, fdt->fd,
- fdt->max_fds * sizeof(struct file *));
- /* clear the remainder of the array */
- memset(&nfdt->fd[fdt->max_fds], 0,
- (nfdt->max_fds - fdt->max_fds) *
- sizeof(struct file *));
- }
-}
-
-/*
- * Allocate an fdset array, using kmalloc or vmalloc.
- * Note: the array isn't cleared at allocation time.
- */
-fd_set * alloc_fdset(int num)