btrfs: cleanup 64bit/32bit divs, provably bounded values
The divisor is derived from nodesize or PAGE_SIZE, fits into 32bit type.
Get rid of a few more do_div instances.
Signed-off-by: David Sterba <dsterba@suse.cz>
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 5a7d63c..2932621 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -2623,9 +2623,8 @@
for (i = 0; i < nr_data_stripes(map); i++) {
*offset = last_offset + i * map->stripe_len;
- stripe_nr = *offset;
- do_div(stripe_nr, map->stripe_len);
- do_div(stripe_nr, nr_data_stripes(map));
+ stripe_nr = div_u64(*offset, map->stripe_len);
+ stripe_nr = div_u64(stripe_nr, nr_data_stripes(map));
/* Work out the disk rotation on this stripe-set */
rot = do_div(stripe_nr, map->num_stripes);
@@ -2994,10 +2993,9 @@
int extent_mirror_num;
int stop_loop = 0;
- nstripes = length;
physical = map->stripes[num].physical;
offset = 0;
- do_div(nstripes, map->stripe_len);
+ nstripes = div_u64(length, map->stripe_len);
if (map->type & BTRFS_BLOCK_GROUP_RAID0) {
offset = map->stripe_len * num;
increment = map->stripe_len * map->num_stripes;