[PATCH] xfs: Simplify xfs_ail_min() with list_first_entry_or_null()

[Jeff Liu <jeff.liu@xxxxxxxxxx>]

From: Jie Liu <jeff.liu@xxxxxxxxxx>

At xfs_ail_min(), we do check if the AIL list is empty or not before
returning the first item in it with list_empty() and list_first_entry().

This can be simplified a bit with a new list operation routine that is
the list_first_entry_or_null() which has been introduced by:

commit 6d7581e62f8be462440d7b22c6361f7c9fa4902b
    list: introduce list_first_entry_or_null

Signed-off-by: Jie Liu <jeff.liu@xxxxxxxxxx>
---
 fs/xfs/xfs_trans_ail.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index 0eda725..e91d160 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -68,10 +68,7 @@ xfs_log_item_t *
 xfs_ail_min(
        struct xfs_ail  *ailp)
 {
-       if (list_empty(&ailp->xa_ail))
-               return NULL;
-
-       return list_first_entry(&ailp->xa_ail, xfs_log_item_t, li_ail);
+       return list_first_entry_or_null(&ailp->xa_ail, xfs_log_item_t, li_ail);
 }
 
  /*
-- 
1.7.9.5