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sunrpc/cache: avoid variable over-loading in cache_defer_req 

In cache_defer_req, 'dreq' is used for two significantly different
values that happen to be of the same type.

This is both confusing, and makes it hard to extend the range of one of
the values as we will in the next patch.
So introduce 'discard' to take one of the values.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
NeilBrown 2009-09-09 16:32:54 +10:00 committed by J. Bruce Fields
parent 67e7328f15
commit cd68c374ea
1 changed files with 9 additions and 9 deletions
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18
net/sunrpc/cache.c
View File

@ -500,7 +500,7 @@ static int cache_defer_cnt;
static int cache_defer_req(struct cache_req *req, struct cache_head *item)
{
struct cache_deferred_req *dreq;
struct cache_deferred_req *dreq, *discard;
int hash = DFR_HASH(item);
if (cache_defer_cnt >= DFR_MAX) {
@ -525,20 +525,20 @@ static int cache_defer_req(struct cache_req *req, struct cache_head *item)
list_add(&dreq->hash, &cache_defer_hash[hash]);
/* it is in, now maybe clean up */
dreq = NULL;
discard = NULL;
if (++cache_defer_cnt > DFR_MAX) {
dreq = list_entry(cache_defer_list.prev,
struct cache_deferred_req, recent);
list_del_init(&dreq->recent);
list_del_init(&dreq->hash);
discard = list_entry(cache_defer_list.prev,
struct cache_deferred_req, recent);
list_del_init(&discard->recent);
list_del_init(&discard->hash);
cache_defer_cnt--;
}
spin_unlock(&cache_defer_lock);
if (dreq) {
if (discard)
/* there was one too many */
dreq->revisit(dreq, 1);
}
discard->revisit(discard, 1);
if (!test_bit(CACHE_PENDING, &item->flags)) {
/* must have just been validated... */
cache_revisit_request(item);