nfs: introduce pg_cleanup op for pgio descriptors

Add a new operation to nfs_pageio_ops that is called on nfs_pageio_complete.

Signed-off-by: Weston Andros Adamson <dros@primarydata.com>

2 files changed, 5 insertions, 1 deletions

diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index c4d175829880..1c031878c752 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -1050,7 +1050,7 @@ int nfs_pageio_resend(struct nfs_pageio_descriptor *desc,
 EXPORT_SYMBOL_GPL(nfs_pageio_resend);
 
 /**
- * nfs_pageio_complete - Complete I/O on an nfs_pageio_descriptor
+ * nfs_pageio_complete - Complete I/O then cleanup an nfs_pageio_descriptor
  * @desc: pointer to io descriptor
  */
 void nfs_pageio_complete(struct nfs_pageio_descriptor *desc)
@@ -1062,6 +1062,9 @@ void nfs_pageio_complete(struct nfs_pageio_descriptor *desc)
                 if (!nfs_do_recoalesce(desc))
                         break;
         }
+
+        if (desc->pg_ops->pg_cleanup)
+                desc->pg_ops->pg_cleanup(desc);
 }
 
 /**
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 4c3aa809ab95..479c566c4ddc 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -58,6 +58,7 @@ struct nfs_pageio_ops {
         size_t  (*pg_test)(struct nfs_pageio_descriptor *, struct nfs_page *,
                            struct nfs_page *);
         int     (*pg_doio)(struct nfs_pageio_descriptor *);
+        void    (*pg_cleanup)(struct nfs_pageio_descriptor *);
 };
 
 struct nfs_rw_ops {