1 files changed, 23 insertions, 0 deletions

diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h
index aa5853502529..708cff72d209 100644
--- a/fs/xfs/xfs_trans_priv.h
+++ b/fs/xfs/xfs_trans_priv.h
@@ -106,4 +106,27 @@ void	xfsaild_wakeup(struct xfs_ail *, xfs_lsn_t);
 int     xfsaild_start(struct xfs_ail *);
 void    xfsaild_stop(struct xfs_ail *);
 
+#if BITS_PER_LONG != 64
+static inline void
+xfs_trans_ail_copy_lsn(
+        struct xfs_ail  *ailp,
+        xfs_lsn_t       *dst,
+        xfs_lsn_t       *src)
+{
+        ASSERT(sizeof(xfs_lsn_t) == 8); /* don't lock if it shrinks */
+        spin_lock(&ailp->xa_mount->m_ail_lock);
+        *dst = *src;
+        spin_unlock(&ailp->xa_mount->m_ail_lock);
+}
+#else
+static inline void
+xfs_trans_ail_copy_lsn(
+        struct xfs_ail  *ailp,
+        xfs_lsn_t       *dst,
+        xfs_lsn_t       *src)
+{
+        ASSERT(sizeof(xfs_lsn_t) == 8);
+        *dst = *src;
+}
+#endif
 #endif  /* __XFS_TRANS_PRIV_H__ */