1 files changed, 24 insertions, 6 deletions

diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 39e4895bcdb4..da2e077b65e2 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -20,12 +20,19 @@
 #include <asm/atomic.h>
 
 /*
+ * Valid flags for the radix tree
+ */
+#define NFS_PAGE_TAG_DIRTY      0
+#define NFS_PAGE_TAG_WRITEBACK  1
+
+/*
  * Valid flags for a dirty buffer
  */
 #define PG_BUSY                 0
 #define PG_NEED_COMMIT          1
 #define PG_NEED_RESCHED         2
 
+struct nfs_inode;
 struct nfs_page {
         struct list_head        wb_list,        /* Defines state of page: */
                                 *wb_list_head;  /*      read/write/commit */
@@ -54,14 +61,17 @@ extern	void nfs_clear_request(struct nfs_page *req);
 extern  void nfs_release_request(struct nfs_page *req);
 
 
-extern  void nfs_list_add_request(struct nfs_page *, struct list_head *);
-
+extern  int nfs_scan_lock_dirty(struct nfs_inode *nfsi, struct list_head *dst,
+                                unsigned long idx_start, unsigned int npages);
 extern  int nfs_scan_list(struct list_head *, struct list_head *,
                           unsigned long, unsigned int);
 extern  int nfs_coalesce_requests(struct list_head *, struct list_head *,
                                   unsigned int);
 extern  int nfs_wait_on_request(struct nfs_page *);
 extern  void nfs_unlock_request(struct nfs_page *req);
+extern  int nfs_set_page_writeback_locked(struct nfs_page *req);
+extern  void nfs_clear_page_writeback(struct nfs_page *req);
+
 
 /*
  * Lock the page of an asynchronous request without incrementing the wb_count
@@ -86,6 +96,18 @@ nfs_lock_request(struct nfs_page *req)
         return 1;
 }
 
+/**
+ * nfs_list_add_request - Insert a request into a list
+ * @req: request
+ * @head: head of list into which to insert the request.
+ */
+static inline void
+nfs_list_add_request(struct nfs_page *req, struct list_head *head)
+{
+        list_add_tail(&req->wb_list, head);
+        req->wb_list_head = head;
+}
+
 
 /**
  * nfs_list_remove_request - Remove a request from its wb_list
@@ -96,10 +118,6 @@ nfs_list_remove_request(struct nfs_page *req)
 {
         if (list_empty(&req->wb_list))
                 return;
-        if (!NFS_WBACK_BUSY(req)) {
-                printk(KERN_ERR "NFS: unlocked request attempted removed from list!\n");
-                BUG();
-        }
         list_del_init(&req->wb_list);
         req->wb_list_head = NULL;
 }