docbook: add pipes, other fixes

Fix some typos in pipe.c and splice.c.
Add pipes API to kernel-api.tmpl.
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

Documentation/DocBook/kernel-api.tmpl

@@ -704,14 +704,23 @@ X!Idrivers/video/console/fonts.c
 
   <chapter id="splice">
       <title>splice API</title>
-  <para>)
+  <para>
 	splice is a method for moving blocks of data around inside the
-	kernel, without continually transferring it between the kernel
+	kernel, without continually transferring them between the kernel
 	and user space.
   </para>
 !Iinclude/linux/splice.h
 !Ffs/splice.c
   </chapter>
 
+  <chapter id="pipes">
+      <title>pipes API</title>
+  <para>
+	Pipe interfaces are all for in-kernel (builtin image) use.
+	They are not exported for use by modules.
+  </para>
+!Iinclude/linux/pipe_fs_i.h
+!Ffs/pipe.c
+  </chapter>
 
 </book>

fs/pipe.c

@@ -255,7 +255,7 @@ void generic_pipe_buf_get(struct pipe_inode_info *pipe, struct pipe_buffer *buf)
 
 /**
  * generic_pipe_buf_confirm - verify contents of the pipe buffer
- * @pipe:	the pipe that the buffer belongs to
+ * @info:	the pipe that the buffer belongs to
  * @buf:	the buffer to confirm
  *
  * Description:

fs/splice.c

@@ -164,7 +164,7 @@ static const struct pipe_buf_operations user_page_pipe_buf_ops = {
  * @spd:	data to fill
  *
  * Description:
- *    @spd contains a map of pages and len/offset tupples, a long with
+ *    @spd contains a map of pages and len/offset tuples, along with
  *    the struct pipe_buf_operations associated with these pages. This
  *    function will link that data to the pipe.
  *
@@ -1000,7 +1000,7 @@ static long do_splice_to(struct file *in, loff_t *ppos,
  * Description:
  *    This is a special case helper to splice directly between two
  *    points, without requiring an explicit pipe. Internally an allocated
- *    pipe is cached in the process, and reused during the life time of
+ *    pipe is cached in the process, and reused during the lifetime of
  *    that process.
  *
  */