From e12c1fd9d680f6b1181ae13efefc416743bd80e5 Mon Sep 17 00:00:00 2001
From: Alasdair G Kergon <agk@redhat.com>
Date: Fri, 10 May 2013 14:37:17 +0100
Subject: [PATCH] dm cache policy: fix description of lookup fn
Correct the documented requirement on the return code from dm cache policy
lookup functions stated in the policy module header file.
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---
drivers/md/dm-cache-policy.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/md/dm-cache-policy.h b/drivers/md/dm-cache-policy.h
index 558bdfdabf5f2d..33369ca9614f97 100644
--- a/drivers/md/dm-cache-policy.h
+++ b/drivers/md/dm-cache-policy.h
@@ -130,8 +130,8 @@ struct dm_cache_policy {
*
* Must not block.
*
- * Returns 1 iff in cache, 0 iff not, < 0 on error (-EWOULDBLOCK
- * would be typical).
+ * Returns 0 if in cache, -ENOENT if not, < 0 for other errors
+ * (-EWOULDBLOCK would be typical).
*/
int (*lookup)(struct dm_cache_policy *p, dm_oblock_t oblock, dm_cblock_t *cblock);
--
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