This patch adds missing documentation to the subbuf_start() callback.
Thanks to Mathieu Desnoyers for pointing it out.
Tom
Signed-off-by: Tom Zanussi <[email protected]>
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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