[XFS] Move the AIL lock into the struct xfs_ail

Bring the ail lock inside the struct xfs_ail. This means the AIL can be
entirely manipulated via the struct xfs_ail rather than needing both the
struct xfs_mount and the struct xfs_ail.

SGI-PV: 988143

SGI-Modid: xfs-linux-melb:xfs-kern:32350a

Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 2951ffd..6d82c23 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2715,11 +2715,11 @@
 		ASSERT(((lip->li_flags & XFS_LI_IN_AIL) == 0) ||
 				       XFS_FORCED_SHUTDOWN(ip->i_mount));
 		if (lip->li_flags & XFS_LI_IN_AIL) {
-			spin_lock(&mp->m_ail_lock);
+			spin_lock(&mp->m_ail->xa_lock);
 			if (lip->li_flags & XFS_LI_IN_AIL)
 				xfs_trans_delete_ail(mp, lip);
 			else
-				spin_unlock(&mp->m_ail_lock);
+				spin_unlock(&mp->m_ail->xa_lock);
 		}
 		xfs_inode_item_destroy(ip);
 		ip->i_itemp = NULL;