+ * bu_init - initialize bulk-read information.
+ * @c: UBIFS file-system description object
+ */
+static void bu_init(struct ubifs_info *c)
+{
+ ubifs_assert(c->bulk_read == 1);
+
+ if (c->bu.buf)
+ return; /* Already initialized */
+
+again:
+ c->bu.buf = kmalloc(c->max_bu_buf_len, GFP_KERNEL | __GFP_NOWARN);
+ if (!c->bu.buf) {
+ if (c->max_bu_buf_len > UBIFS_KMALLOC_OK) {
+ c->max_bu_buf_len = UBIFS_KMALLOC_OK;
+ goto again;
+ }
+
+ /* Just disable bulk-read */
+ ubifs_warn("Cannot allocate %d bytes of memory for bulk-read, "
+ "disabling it", c->max_bu_buf_len);
+ c->mount_opts.bulk_read = 1;
+ c->bulk_read = 0;
+ return;
+ }
+}
+
+/**
+ * check_free_space - check if there is enough free space to mount.
+ * @c: UBIFS file-system description object
+ *
+ * This function makes sure UBIFS has enough free space to be mounted in
+ * read/write mode. UBIFS must always have some free space to allow deletions.
+ */
+static int check_free_space(struct ubifs_info *c)
+{
+ ubifs_assert(c->dark_wm > 0);
+ if (c->lst.total_free + c->lst.total_dirty < c->dark_wm) {
+ ubifs_err("insufficient free space to mount in read/write mode");
+ dbg_dump_budg(c);
+ dbg_dump_lprops(c);
+ return -ENOSPC;
+ }
+ return 0;
+}
+
+/**