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authorAlasdair G Kergon <agk@redhat.com>2013-05-10 14:37:17 +0100
committerAlasdair G Kergon <agk@redhat.com>2013-05-10 14:37:17 +0100
commite12c1fd9d680f6b1181ae13efefc416743bd80e5 (patch)
treebb86784049268de6af9c153bd23a3bf83c74f091 /drivers
parent058ce5ca8155a4c8eeac9b9e8a70e6664996337b (diff)
downloadlinux-linaro-stable-e12c1fd9d680f6b1181ae13efefc416743bd80e5.tar.gz
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/md/dm-cache-policy.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/md/dm-cache-policy.h b/drivers/md/dm-cache-policy.h
index 558bdfdabf5f..33369ca9614f 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);