From 6dc44636ad3a70c16976f765b066fe38ba3d0089 Mon Sep 17 00:00:00 2001
From: Alasdair Kergon <agk@redhat.com>
Date: Wed, 5 Dec 2007 16:28:19 +0000
Subject: [PATCH] clarify when read_ahead may be set

---
 lib/libdevmapper.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/libdevmapper.h b/lib/libdevmapper.h
index 7e9810a..ef2b530 100644
--- a/lib/libdevmapper.h
+++ b/lib/libdevmapper.h
@@ -165,6 +165,9 @@ int dm_task_suppress_identical_reload(struct dm_task *dmt);
 
 #define DM_READ_AHEAD_MINIMUM_FLAG	0x1	/* Value supplied is minimum */
 
+/*
+ * Read ahead is set with DM_DEVICE_CREATE with a table or DM_DEVICE_RESUME.
+ */
 int dm_task_set_read_ahead(struct dm_task *dmt, uint32_t read_ahead,
 			   uint32_t read_ahead_flags);
 uint32_t dm_task_get_read_ahead(const struct dm_task *dmt,
-- 
2.43.5