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Viewing changes to fs/xfs/xfs_iget.c

  • Committer: Package Import Robot
  • Author(s): Luke Yelavich, Luke Yelavich, Upstream Kernel Changes
  • Date: 2012-04-04 18:49:36 UTC
  • Revision ID: package-import@ubuntu.com-20120404184936-tqu735914muv4wpg
Tags: 3.2.0-22.30
[ Luke Yelavich ]

* [Config] Update configs after rebase against Ubuntu-3.2.0-22.35

[ Upstream Kernel Changes ]

* Low-latency: Rebase against Ubuntu-3.2.0-22.35

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fs/xfs/xfs_iget.c
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                        BUG();
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        }
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        /*
 
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         * These values must be set before inserting the inode into the radix
 
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         * tree as the moment it is inserted a concurrent lookup (allowed by the
 
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         * RCU locking mechanism) can find it and that lookup must see that this
 
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         * is an inode currently under construction (i.e. that XFS_INEW is set).
 
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         * The ip->i_flags_lock that protects the XFS_INEW flag forms the
 
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         * memory barrier that ensures this detection works correctly at lookup
 
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         * time.
 
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         */
 
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        ip->i_udquot = ip->i_gdquot = NULL;
 
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        xfs_iflags_set(ip, XFS_INEW);
 
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        /* insert the new inode */
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        spin_lock(&pag->pag_ici_lock);
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        /* insert the new inode */
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        error = radix_tree_insert(&pag->pag_ici_root, agino, ip);
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        if (unlikely(error)) {
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                WARN_ON(error != -EEXIST);
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                error = EAGAIN;
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                goto out_preload_end;
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        }
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        /* These values _must_ be set before releasing the radix tree lock! */
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        ip->i_udquot = ip->i_gdquot = NULL;
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        xfs_iflags_set(ip, XFS_INEW);
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        spin_unlock(&pag->pag_ici_lock);
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        radix_tree_preload_end();
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