[PATCH 3/4] btrfs: Record delta directly in transaction_kthread

[Nikolay Borisov <nborisov@suse.com>]

Rename 'now' to 'delta' and store there the delta between transaction
start time and current time. This is in preparation for optimising the
sleep logic in the next patch. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
---
 fs/btrfs/disk-io.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index b9fbbf66ccee..c5d3e7f75066 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1715,7 +1715,7 @@ static int transaction_kthread(void *arg)
 	struct btrfs_trans_handle *trans;
 	struct btrfs_transaction *cur;
 	u64 transid;
-	time64_t now;
+	time64_t delta;
 	unsigned long delay;
 	bool cannot_commit;
 
@@ -1731,9 +1731,9 @@ static int transaction_kthread(void *arg)
 			goto sleep;
 		}
 
-		now = ktime_get_seconds();
+		delta = ktime_get_seconds() - cur->start_time;
 		if (cur->state < TRANS_STATE_COMMIT_START &&
-		    (now - cur->start_time < fs_info->commit_interval)) {
+		    delta < fs_info->commit_interval) {
 			spin_unlock(&fs_info->trans_lock);
 			delay = msecs_to_jiffies(5000);
 			goto sleep;
-- 
2.17.1