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dm cache: resolve small nits and improve Documentation

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Document passthrough mode, cache shrinking, and cache invalidation.
Also, use strcasecmp() and hlist_unhashed().

Reported-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer
2013-11-12 12:17:43 -05:00
parent 65790ff919
commit 7b6b2bc98c
3 changed files with 34 additions and 12 deletions
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2
drivers/md/dm-cache-policy-mq.c
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@@ -310,7 +310,7 @@ static void free_entry(struct entry_pool *ep, struct entry *e)
static struct entry *epool_find(struct entry_pool *ep, dm_cblock_t cblock)
{
struct entry *e = ep->entries + from_cblock(cblock);
return e->hlist.pprev ? e : NULL;
return !hlist_unhashed(&e->hlist) ? e : NULL;
}
static bool epool_empty(struct entry_pool *ep)