btrfs: remove shadowing variables in __btrfs_map_block

1) We can safely use the function's 'i'. Fixes warning

fs/btrfs/volumes.c:5257:7: warning: declaration of 'i' shadows a previous local
fs/btrfs/volumes.c:4951:6: warning: shadowed declaration is here

2) A local variable duplicates name of an argument, we can use the value
directly. Fixes warning

fs/btrfs/volumes.c:5433:8: warning: declaration of 'length' shadows a parameter
fs/btrfs/volumes.c:4935:27: warning: shadowed declaration is here

Signed-off-by: David Sterba <dsterba@suse.cz>

1 files changed, 1 insertions, 4 deletions

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 3df83539f532..64ec2fd624da 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -5262,7 +5262,6 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
             need_raid_map && ((rw & (REQ_WRITE | REQ_GET_READ_MIRRORS)) ||
             mirror_num > 1)) {
                 u64 tmp;
-                int i;
                 unsigned rot;
 
                 bbio->raid_map = (u64 *)((void *)bbio->stripes +
@@ -5438,9 +5437,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
                         }
                 }
                 if (found) {
-                        u64 length = map->stripe_len;
-
-                        if (physical_of_found + length <=
+                        if (physical_of_found + map->stripe_len <=
                             dev_replace->cursor_left) {
                                 struct btrfs_bio_stripe *tgtdev_stripe =
                                         bbio->stripes + num_stripes;