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btrfs: Remove unused extent_root var from caching_thread 

Added by b4570aa994 ("btrfs: fix compiling with CONFIG_BTRFS_DEBUG
enabled.") and obsoleted by 2ff7e61e0d ("btrfs: take an fs_info
directly when the root is not used otherwise").

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2018-03-15 14:36:28 +02:00 committed by David Sterba
parent 338dae1ae6
commit 101d2dc0b2
1 changed files with 0 additions and 2 deletions
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2
fs/btrfs/extent-tree.c
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@ -535,13 +535,11 @@ static noinline void caching_thread(struct btrfs_work *work)
struct btrfs_block_group_cache *block_group;
struct btrfs_fs_info *fs_info;
struct btrfs_caching_control *caching_ctl;
struct btrfs_root *extent_root;
int ret;
caching_ctl = container_of(work, struct btrfs_caching_control, work);
block_group = caching_ctl->block_group;
fs_info = block_group->fs_info;
extent_root = fs_info->extent_root;
mutex_lock(&caching_ctl->mutex);
down_read(&fs_info->commit_root_sem);