[XFS] replace inode flush semaphore with a completion

Use the new completion flush code to implement the inode flush lock.
Removes one of the final users of semaphores in the XFS code base.

SGI-PV: 981498

SGI-Modid: xfs-linux-melb:xfs-kern:31817a

Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

1 files changed, 5 insertions, 6 deletions

diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index 0eee08a32c26..97c7452e2620 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -779,11 +779,10 @@ xfs_inode_item_pushbuf(
         ASSERT(iip->ili_push_owner == current_pid());
 
         /*
-         * If flushlock isn't locked anymore, chances are that the
-         * inode flush completed and the inode was taken off the AIL.
-         * So, just get out.
+         * If a flush is not in progress anymore, chances are that the
+         * inode was taken off the AIL. So, just get out.
          */
-        if (!issemalocked(&(ip->i_flock)) ||
+        if (completion_done(&ip->i_flush) ||
             ((iip->ili_item.li_flags & XFS_LI_IN_AIL) == 0)) {
                 iip->ili_pushbuf_flag = 0;
                 xfs_iunlock(ip, XFS_ILOCK_SHARED);
@@ -805,7 +804,7 @@ xfs_inode_item_pushbuf(
                          * If not, we can flush it async.
                          */
                         dopush = ((iip->ili_item.li_flags & XFS_LI_IN_AIL) &&
-                                  issemalocked(&(ip->i_flock)));
+                                  !completion_done(&ip->i_flush));
                         iip->ili_pushbuf_flag = 0;
                         xfs_iunlock(ip, XFS_ILOCK_SHARED);
                         xfs_buftrace("INODE ITEM PUSH", bp);
@@ -858,7 +857,7 @@ xfs_inode_item_push(
         ip = iip->ili_inode;
 
         ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED));
-        ASSERT(issemalocked(&(ip->i_flock)));
+        ASSERT(!completion_done(&ip->i_flush));
         /*
          * Since we were able to lock the inode's flush lock and
          * we found it on the AIL, the inode must be dirty.  This