sunrpc/cache: simplify cache_fresh_locked and cache_fresh_unlocked.

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>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 1a50dfe..f2895d0 100644 (file)
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -105,18 +105,16 @@ 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);
@@ -132,7 +130,6 @@ 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);
@@ -141,9 +138,9 @@ 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);
@@ -167,11 +164,11 @@ 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;
 }
@@ -240,8 +237,8 @@ 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;