[PATCH 2.6.12-mm1] relayfs: function docfix

[Tom Zanussi <zanussi@us.ibm.com>]

This patch adds missing documentation to the subbuf_start() callback.
Thanks to Mathieu Desnoyers for pointing it out.

Tom

Signed-off-by: Tom Zanussi <zanussi@us.ibm.com>

diff -urpN -X dontdiff linux-2.6.12-mm1/include/linux/relayfs_fs.h linux-2.6.12-mm1-cur/include/linux/relayfs_fs.h
--- linux-2.6.12-mm1/include/linux/relayfs_fs.h	2005-06-22 11:16:23.000000000 -0500
+++ linux-2.6.12-mm1-cur/include/linux/relayfs_fs.h	2005-06-22 11:44:46.000000000 -0500
@@ -88,6 +88,9 @@ struct rchan_callbacks
 	 * @prev_subbuf_idx: the previous sub-buffer's index
 	 * @prev_subbuf: the start of the previous sub-buffer
 	 *
+	 * The client should return the number of bytes it reserves at
+	 * the beginning of the sub-buffer, 0 if none.
+	 *
 	 * NOTE: subbuf_start will also be invoked when the buffer is
 	 *       created, so that the first sub-buffer can be initialized
 	 *       if necessary.  In this case, prev_subbuf will be NULL.


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