[PATCH][2.5] Fix block backed loop mounts

[Zwane Mwaikambo]

Hi Jens,
	This is a patch which Adam Richter posted sometime back, it still 
hasn't been integrated as of 2.5.3-pre3. I've tested the patch on my box 
and vote for it, it applies clean on 2.5.3-pre3.

Regards,
	Zwane Mwaikambo

--- linux-2.5.2-pre11/drivers/block/loop.c	Mon Jan 14 05:48:01 2002
+++ linux/drivers/block/loop.c	Mon Jan 14 06:13:33 2002
@@ -488,15 +488,15 @@
 			      struct bio *rbh)
 {
 	unsigned long IV = loop_get_iv(lo, rbh->bi_sector);
-	struct bio_vec *to;
+	struct bio_vec *from;
 	char *vto, *vfrom;
 	int ret = 0, i;

-	bio_for_each_segment(to, bio, i) {
-		vfrom = page_address(rbh->bi_io_vec[i].bv_page) + rbh->bi_io_vec[i].bv_offset;
-		vto = page_address(to->bv_page) + to->bv_offset;
+	bio_for_each_segment(from, rbh, i) {
+		vfrom = page_address(from->bv_page) + from->bv_offset;
+		vto = page_address(bio->bi_io_vec[i].bv_page) + bio->bi_io_vec[i].bv_offset;
 		ret |= lo_do_transfer(lo, bio_data_dir(bio), vto, vfrom,
-					to->bv_len, IV);
+					from->bv_len, IV);
 	}

 	return ret;