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Btrfs: use signed integer instead of unsigned long integer for log transid

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The log trans id is initialized to be 0 every time we create a log tree,
and the log tree need be re-created after a new transaction is started,
it means the log trans id is unlikely to be a huge number, so we can use
signed integer instead of unsigned long integer to save a bit space.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
This commit is contained in:
Miao Xie
2014-02-20 18:08:56 +08:00
committed by Josef Bacik
parent 7483e1a446
commit bb14a59b61
3 changed files with 12 additions and 12 deletions
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4
fs/btrfs/tree-log.c
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@@ -2362,7 +2362,7 @@ static int update_log_root(struct btrfs_trans_handle *trans,
}
static int wait_log_commit(struct btrfs_trans_handle *trans,
struct btrfs_root *root, unsigned long transid)
struct btrfs_root *root, int transid)
{
DEFINE_WAIT(wait);
int index = transid % 2;
@@ -2434,7 +2434,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
int ret;
struct btrfs_root *log = root->log_root;
struct btrfs_root *log_root_tree = root->fs_info->log_root_tree;
unsigned long log_transid = 0;
int log_transid = 0;
struct blk_plug plug;
mutex_lock(&root->log_mutex);