[PATCH 1/3] btrfs: remove btrfs_chunk_map::io_(align|width) members

Those two members are read from on-disk metadata, but never utilized.
And for new chunks we always set those members to BTRFS_STRIPE_LEN
anyway.

Thus there is no need to keep them inside btrfs_chunk_map.

Signed-off-by: Qu Wenruo <[email protected]>
---
 fs/btrfs/volumes.c | 4 ----
 fs/btrfs/volumes.h | 2 --
 2 files changed, 6 deletions(-)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 93a923e4ecaf..daa8f1ddf713 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6019,8 +6019,6 @@ static struct btrfs_block_group *create_chunk(struct btrfs_trans_handle *trans,
 	map->chunk_len = ctl->chunk_size;
 	map->stripe_size = ctl->stripe_size;
 	map->type = type;
-	map->io_align = BTRFS_STRIPE_LEN;
-	map->io_width = BTRFS_STRIPE_LEN;
 	map->sub_stripes = ctl->sub_stripes;
 	map->num_stripes = ctl->num_stripes;
 
@@ -7583,8 +7581,6 @@ static int read_one_chunk(struct btrfs_key *key, struct extent_buffer *leaf,
 	map->start = logical;
 	map->chunk_len = length;
 	map->num_stripes = num_stripes;
-	map->io_width = btrfs_chunk_io_width(leaf, chunk);
-	map->io_align = btrfs_chunk_io_align(leaf, chunk);
 	map->type = type;
 	/*
 	 * We can't use the sub_stripes value, as for profiles other than
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 96904d18f686..f24385b599dc 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -633,8 +633,6 @@ struct btrfs_chunk_map {
 	u64 chunk_len;
 	u64 stripe_size;
 	u64 type;
-	int io_align;
-	int io_width;
 	int num_stripes;
 	int sub_stripes;
 	struct btrfs_io_stripe stripes[];
-- 
2.54.0