[PATCH 03/12] sunrpc/cache: simplify cache_fresh_locked and cache_fresh_unlocked.

NeilBrown
2009-08-04T05:24:27Z

The extra call to cache_revisit_request in cache_fresh_unlocked is not
needed, as should have been fairly clear at the time of
commit 4013edea9a0b6cdcb1fdf5d4011e47e068fd6efb

If there are requests to be revisited, then we can be sure that
CACHE_PENDING is set, so the second call is sufficient.

So remove the first call.
Then remove the 'new' parameter,
then remove the return value for cache_fresh_locked which is only used
to provide the value for 'new'.

Signed-off-by: NeilBrown <neilb@suse.de>
---

net/sunrpc/cache.c | 23 ++++++++++-------------
1 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 44f4516..c1f897c 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -103,18 +103,16 @@ EXPORT_SYMBOL_GPL(sunrpc_cache_lookup);

static void cache_dequeue(struct cache_detail *detail, struct cache_head *ch);

-static int cache_fresh_locked(struct cache_head *head, time_t expiry)
+static void cache_fresh_locked(struct cache_head *head, time_t expiry)
{
head->expiry_time = expiry;
head->last_refresh = get_seconds();
- return !test_and_set_bit(CACHE_VALID, &head->flags);
+ set_bit(CACHE_VALID, &head->flags);
}

static void cache_fresh_unlocked(struct cache_head *head,
- struct cache_detail *detail, int new)
+ struct cache_detail *detail)
{
- if (new)
- cache_revisit_request(head);
if (test_and_clear_bit(CACHE_PENDING, &head->flags)) {
cache_revisit_request(head);
cache_dequeue(detail, head);
@@ -130,7 +128,6 @@ struct cache_head *sunrpc_cache_update(struct cache_detail *detail,
*/
struct cache_head **head;
struct cache_head *tmp;
- int is_new;

if (!test_bit(CACHE_VALID, &old->flags)) {
write_lock(&detail->hash_lock);
@@ -139,9 +136,9 @@ struct cache_head *sunrpc_cache_update(struct cache_detail *detail,
set_bit(CACHE_NEGATIVE, &old->flags);
else
detail->update(old, new);
- is_new = cache_fresh_locked(old, new->expiry_time);
+ cache_fresh_locked(old, new->expiry_time);
write_unlock(&detail->hash_lock);
- cache_fresh_unlocked(old, detail, is_new);
+ cache_fresh_unlocked(old, detail);
return old;
}
write_unlock(&detail->hash_lock);
@@ -165,11 +162,11 @@ struct cache_head *sunrpc_cache_update(struct cache_detail *detail,
*head = tmp;
detail->entries++;
cache_get(tmp);
- is_new = cache_fresh_locked(tmp, new->expiry_time);
+ cache_fresh_locked(tmp, new->expiry_time);
cache_fresh_locked(old, 0);
write_unlock(&detail->hash_lock);
- cache_fresh_unlocked(tmp, detail, is_new);
- cache_fresh_unlocked(old, detail, 0);
+ cache_fresh_unlocked(tmp, detail);
+ cache_fresh_unlocked(old, detail);
cache_put(old, detail);
return tmp;
}
@@ -224,8 +221,8 @@ int cache_check(struct cache_detail *detail,
cache_revisit_request(h);
if (rv == -EAGAIN) {
set_bit(CACHE_NEGATIVE, &h->flags);
- cache_fresh_unlocked(h, detail,
- cache_fresh_locked(h, get_seconds()+CACHE_NEW_EXPIRY));
+ cache_fresh_locked(h, get_seconds()+CACHE_NEW_EXPIRY);
+ cache_fresh_unlocked(h, detail);
rv = -ENOENT;
}
break;