[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 f1dcd80cf066..dab57374e1fe 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;