From: Alasdair G Kergon Date: Fri, 10 May 2013 13:37:17 +0000 (+0100) Subject: dm cache policy: fix description of lookup fn X-Git-Tag: firefly_0821_release~3680^2~494^2~11 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e12c1fd9d680f6b1181ae13efefc416743bd80e5;p=firefly-linux-kernel-4.4.55.git 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 --- 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);