[XFS] Add ail pointer into log items

Add an xfs_ail pointer to log items so that the log items can reference
the AIL directly during callbacks without needed a struct xfs_mount.

SGI-PV: 988143

SGI-Modid: xfs-linux-melb:xfs-kern:32352a

Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index c557fd682527..793e53c01dc0 100644
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -731,6 +731,7 @@ xfs_buf_item_init(
         bip->bli_item.li_type = XFS_LI_BUF;
         bip->bli_item.li_ops = &xfs_buf_item_ops;
         bip->bli_item.li_mountp = mp;
+        bip->bli_item.li_ailp = mp->m_ail;
         bip->bli_buf = bp;
         xfs_buf_hold(bp);
         bip->bli_format.blf_type = XFS_LI_BUF;
@@ -1123,11 +1124,13 @@ xfs_buf_iodone(
         xfs_buf_log_item_t      *bip)
 {
         struct xfs_mount        *mp;
+        struct xfs_ail          *ailp;
 
         ASSERT(bip->bli_buf == bp);
 
         xfs_buf_rele(bp);
         mp = bip->bli_item.li_mountp;
+        ailp = bip->bli_item.li_ailp;
 
         /*
          * If we are forcibly shutting down, this may well be
@@ -1138,7 +1141,7 @@ xfs_buf_iodone(
          *
          * Either way, AIL is useless if we're forcing a shutdown.
          */
-        spin_lock(&mp->m_ail->xa_lock);
+        spin_lock(&ailp->xa_lock);
         /*
          * xfs_trans_delete_ail() drops the AIL lock.
          */