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Btrfs: remove no longer used member num_dirty_bgs from transaction 

The member num_dirty_bgs of struct btrfs_transaction is not used anymore,
it is set and incremented but nothing reads its value anymore. Its last
read use was removed by commit 64403612b7 ("btrfs: rework
btrfs_check_space_for_delayed_refs"). So just remove that member.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2019-04-15 09:29:19 +01:00 committed by David Sterba
parent 2b584c688b
commit 74f657d89c
3 changed files with 0 additions and 3 deletions
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1
fs/btrfs/extent-tree.c
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@ -6431,7 +6431,6 @@ static int update_block_group(struct btrfs_trans_handle *trans,
if (list_empty(&cache->dirty_list)) {
list_add_tail(&cache->dirty_list,
&trans->transaction->dirty_bgs);
trans->transaction->num_dirty_bgs++;
trans->delayed_ref_updates++;
btrfs_get_block_group(cache);
}

1
fs/btrfs/transaction.c
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@ -233,7 +233,6 @@ loop:
INIT_LIST_HEAD(&cur_trans->io_bgs);
INIT_LIST_HEAD(&cur_trans->dropped_roots);
mutex_init(&cur_trans->cache_write_mutex);
cur_trans->num_dirty_bgs = 0;
spin_lock_init(&cur_trans->dirty_bgs_lock);
INIT_LIST_HEAD(&cur_trans->deleted_bgs);
spin_lock_init(&cur_trans->dropped_roots_lock);

1
fs/btrfs/transaction.h
View File

@ -80,7 +80,6 @@ struct btrfs_transaction {
*/
struct mutex cache_write_mutex;
spinlock_t dirty_bgs_lock;
unsigned int num_dirty_bgs;
/* Protected by spin lock fs_info->unused_bgs_lock. */
struct list_head deleted_bgs;
spinlock_t dropped_roots_lock;