Merge branch 'splice' of git://brick.kernel.dk/data/git/linux-2.6-block

* 'splice' of git://brick.kernel.dk/data/git/linux-2.6-block:
  [PATCH] splice: fix page stealing LRU handling.
  [PATCH] splice: page stealing needs to wait_on_page_writeback()
  [PATCH] splice: export generic_splice_sendpage
  [PATCH] splice: add a SPLICE_F_MORE flag
  [PATCH] splice: add comments documenting more of the code
  [PATCH] splice: improve writeback and clean up page stealing
  [PATCH] splice: fix shadow[] filling logic

fs/pipe.c

@@ -95,6 +95,8 @@ static void anon_pipe_buf_release(struct pipe_inode_info *info, struct pipe_buff
 {
 	struct page *page = buf->page;
 
+	buf->flags &= ~PIPE_BUF_FLAG_STOLEN;
+
 	/*
 	 * If nobody else uses this page, and we don't already have a
 	 * temporary page, let's keep track of it as a one-deep
@@ -124,7 +126,7 @@ static void anon_pipe_buf_unmap(struct pipe_inode_info *info, struct pipe_buffer
 static int anon_pipe_buf_steal(struct pipe_inode_info *info,
 			       struct pipe_buffer *buf)
 {
-	buf->stolen = 1;
+	buf->flags |= PIPE_BUF_FLAG_STOLEN;
 	return 0;
 }
 

include/linux/pipe_fs_i.h

@@ -5,11 +5,14 @@
 
 #define PIPE_BUFFERS (16)
 
+#define PIPE_BUF_FLAG_STOLEN	0x01
+#define PIPE_BUF_FLAG_LRU	0x02
+
 struct pipe_buffer {
 	struct page *page;
 	unsigned int offset, len;
 	struct pipe_buf_operations *ops;
-	unsigned int stolen;
+	unsigned int flags;
 };
 
 struct pipe_buf_operations {
@@ -63,5 +66,6 @@ void free_pipe_info(struct inode* inode);
 #define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */
 				 /* we may still block on the fd we splice */
 				 /* from/to, of course */
+#define SPLICE_F_MORE	(0x04)	/* expect more data */
 
 #endif