+}
+
+void free_fdtable(struct fdtable *fdt)
+{
+ if (fdt->free_files || fdt->max_fdset > __FD_SETSIZE ||
+ fdt->max_fds > NR_OPEN_DEFAULT)
+ call_rcu(&fdt->rcu, free_fdtable_rcu);
+}
+
+/*
+ * Expand the fdset in the files_struct. Called with the files spinlock
+ * held for write.
+ */
+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 *));
+ }
+ nfdt->next_fd = fdt->next_fd;