[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, 18 insertions, 10 deletions

diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c
index f1dcd80cf06..dab57374e1f 100644
--- a/fs/xfs/xfs_extfree_item.c
+++ b/fs/xfs/xfs_extfree_item.c
@@ -108,10 +108,12 @@ xfs_efi_item_pin(xfs_efi_log_item_t *efip)
 STATIC void
 xfs_efi_item_unpin(xfs_efi_log_item_t *efip, int stale)
 {
-	xfs_mount_t	*mp;
+	xfs_mount_t		*mp;
+	struct xfs_ail		*ailp;
 
 	mp = efip->efi_item.li_mountp;
-	spin_lock(&mp->m_ail->xa_lock);
+	ailp = efip->efi_item.li_ailp;
+	spin_lock(&ailp->xa_lock);
 	if (efip->efi_flags & XFS_EFI_CANCELED) {
 		/*
 		 * xfs_trans_delete_ail() drops the AIL lock.
@@ -120,7 +122,7 @@ xfs_efi_item_unpin(xfs_efi_log_item_t *efip, int stale)
 		xfs_efi_item_free(efip);
 	} else {
 		efip->efi_flags |= XFS_EFI_COMMITTED;
-		spin_unlock(&mp->m_ail->xa_lock);
+		spin_unlock(&ailp->xa_lock);
 	}
 }
 
@@ -134,11 +136,13 @@ xfs_efi_item_unpin(xfs_efi_log_item_t *efip, int stale)
 STATIC void
 xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp)
 {
-	xfs_mount_t	*mp;
+	xfs_mount_t		*mp;
+	struct xfs_ail		*ailp;
 	xfs_log_item_desc_t	*lidp;
 
 	mp = efip->efi_item.li_mountp;
-	spin_lock(&mp->m_ail->xa_lock);
+	ailp = efip->efi_item.li_ailp;
+	spin_lock(&ailp->xa_lock);
 	if (efip->efi_flags & XFS_EFI_CANCELED) {
 		/*
 		 * free the xaction descriptor pointing to this item
@@ -153,7 +157,7 @@ xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp)
 		xfs_efi_item_free(efip);
 	} else {
 		efip->efi_flags |= XFS_EFI_COMMITTED;
-		spin_unlock(&mp->m_ail->xa_lock);
+		spin_unlock(&ailp->xa_lock);
 	}
 }
 
@@ -268,6 +272,7 @@ xfs_efi_init(xfs_mount_t	*mp,
 	efip->efi_item.li_type = XFS_LI_EFI;
 	efip->efi_item.li_ops = &xfs_efi_item_ops;
 	efip->efi_item.li_mountp = mp;
+	efip->efi_item.li_ailp = mp->m_ail;
 	efip->efi_format.efi_nextents = nextents;
 	efip->efi_format.efi_id = (__psint_t)(void*)efip;
 
@@ -345,14 +350,16 @@ void
 xfs_efi_release(xfs_efi_log_item_t	*efip,
 		uint			nextents)
 {
-	xfs_mount_t	*mp;
-	int		extents_left;
+	xfs_mount_t		*mp;
+	struct xfs_ail		*ailp;
+	int			extents_left;
 
 	mp = efip->efi_item.li_mountp;
+	ailp = efip->efi_item.li_ailp;
 	ASSERT(efip->efi_next_extent > 0);
 	ASSERT(efip->efi_flags & XFS_EFI_COMMITTED);
 
-	spin_lock(&mp->m_ail->xa_lock);
+	spin_lock(&ailp->xa_lock);
 	ASSERT(efip->efi_next_extent >= nextents);
 	efip->efi_next_extent -= nextents;
 	extents_left = efip->efi_next_extent;
@@ -363,7 +370,7 @@ xfs_efi_release(xfs_efi_log_item_t	*efip,
 		xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip);
 		xfs_efi_item_free(efip);
 	} else {
-		spin_unlock(&mp->m_ail->xa_lock);
+		spin_unlock(&ailp->xa_lock);
 	}
 }
 
@@ -565,6 +572,7 @@ xfs_efd_init(xfs_mount_t	*mp,
 	efdp->efd_item.li_type = XFS_LI_EFD;
 	efdp->efd_item.li_ops = &xfs_efd_item_ops;
 	efdp->efd_item.li_mountp = mp;
+	efdp->efd_item.li_ailp = mp->m_ail;
 	efdp->efd_efip = efip;
 	efdp->efd_format.efd_nextents = nextents;
 	efdp->efd_format.efd_efi_id = efip->efi_format.efi_id;