btrfs: cleanup: use for() loop in btrfs_map_bio()
for() is obviously better in these code block, and remove noused
init-value to reduce about 6 bytes binary size.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: David Sterba <dsterba@suse.cz>
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 30c6074..d7d1dde 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -5820,8 +5820,8 @@
u64 length = 0;
u64 map_length;
int ret;
- int dev_nr = 0;
- int total_devs = 1;
+ int dev_nr;
+ int total_devs;
struct btrfs_bio *bbio = NULL;
length = bio->bi_iter.bi_size;
@@ -5862,11 +5862,10 @@
BUG();
}
- while (dev_nr < total_devs) {
+ for (dev_nr = 0; dev_nr < total_devs; dev_nr++) {
dev = bbio->stripes[dev_nr].dev;
if (!dev || !dev->bdev || (rw & WRITE && !dev->writeable)) {
bbio_error(bbio, first_bio, logical);
- dev_nr++;
continue;
}
@@ -5879,7 +5878,6 @@
ret = breakup_stripe_bio(root, bbio, first_bio, dev,
dev_nr, rw, async_submit);
BUG_ON(ret);
- dev_nr++;
continue;
}
@@ -5894,7 +5892,6 @@
submit_stripe_bio(root, bbio, bio,
bbio->stripes[dev_nr].physical, dev_nr, rw,
async_submit);
- dev_nr++;
}
btrfs_bio_counter_dec(root->fs_info);
return 0;