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btrfs: remove extent_map::bdev

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We can now remove the bdev from extent_map. Previous patches made sure
that bio_set_dev is correctly in all places and that we don't need to
grab it from latest_bdev or pass it around inside the extent map.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2019-08-30 15:40:53 +02:00
parent 1a41802701
commit a019e9e197
8 changed files with 2 additions and 31 deletions
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3
fs/btrfs/disk-io.c
View file

@ -205,7 +205,6 @@ struct extent_map *btree_get_extent(struct btrfs_inode *inode,
struct page *page, size_t pg_offset, u64 start, u64 len,
int create)
{
struct btrfs_fs_info *fs_info = inode->root->fs_info;
struct extent_map_tree *em_tree = &inode->extent_tree;
struct extent_map *em;
int ret;
@ -213,7 +212,6 @@ struct extent_map *btree_get_extent(struct btrfs_inode *inode,
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, start, len);
if (em) {
em->bdev = fs_info->fs_devices->latest_bdev;
read_unlock(&em_tree->lock);
goto out;
}
@ -228,7 +226,6 @@ struct extent_map *btree_get_extent(struct btrfs_inode *inode,
em->len = (u64)-1;
em->block_len = (u64)-1;
em->block_start = 0;
em->bdev = fs_info->fs_devices->latest_bdev;
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em, 0);