[RFC PATCH 2/3] xfs: fold grant space update into head check function

[Brian Foster <bfoster@redhat.com>]

The grant space add helper is separate from the check helper that
potentially queues the task until sufficient log reservation is
available. Callers of xlog_grant_head_check() immediately update the
grant head on return. To facilitate additional coordination between
the grant head check and update, fold the space update into the
checking function. No functional changes.

Signed-off-by: Brian Foster <bfoster@redhat.com>
---
 fs/xfs/xfs_log.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 045ab648ca96..ce0aac89e675 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -342,6 +342,9 @@ xlog_grant_head_check(
 		spin_unlock(&head->lock);
 	}
 
+	if (!error)
+		xlog_grant_add_space(log, &head->grant, *need_bytes);
+
 	return error;
 }
 
@@ -409,7 +412,6 @@ xfs_log_regrant(
 	if (error)
 		goto out_error;
 
-	xlog_grant_add_space(log, &log->l_write_head.grant, need_bytes);
 	trace_xfs_log_regrant_exit(log, tic);
 	xlog_verify_grant_tail(log);
 	return 0;
@@ -468,7 +470,6 @@ xfs_log_reserve(
 	if (error)
 		goto out_error;
 
-	xlog_grant_add_space(log, &log->l_reserve_head.grant, need_bytes);
 	xlog_grant_add_space(log, &log->l_write_head.grant, need_bytes);
 	trace_xfs_log_reserve_exit(log, tic);
 	xlog_verify_grant_tail(log);
-- 
2.20.1