[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>

1 files changed, 3 insertions, 2 deletions

diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h
index 708cff72d209..6ca0a7a7e3df 100644
--- a/fs/xfs/xfs_trans_priv.h
+++ b/fs/xfs/xfs_trans_priv.h
@@ -79,6 +79,7 @@ struct xfs_ail {
         struct task_struct      *xa_task;
         xfs_lsn_t               xa_target;
         struct xfs_ail_cursor   xa_cursors;
+        spinlock_t              xa_lock;
 };
 
 /*
@@ -114,9 +115,9 @@ xfs_trans_ail_copy_lsn(
         xfs_lsn_t       *src)
 {
         ASSERT(sizeof(xfs_lsn_t) == 8); /* don't lock if it shrinks */
-        spin_lock(&ailp->xa_mount->m_ail_lock);
+        spin_lock(&ailp->xa_lock);
         *dst = *src;
-        spin_unlock(&ailp->xa_mount->m_ail_lock);
+        spin_unlock(&ailp->xa_lock);
 }
 #else
 static inline void