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NFSD: Skip extra computation for RC_NOCACHE case

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[ Upstream commit 0f29ce32fbc56cfdb304eec8a4deb920ccfd89c3 ]

Force the compiler to skip unneeded initialization for cases that
don't need those values. For example, NFSv4 COMPOUND operations are
RC_NOCACHE.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chuck Lever 2021-09-28 11:39:02 -04:00 committed by Greg Kroah-Hartman
parent 4aa8dac58c
commit 3304d16c24
1 changed files with 4 additions and 2 deletions
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6
fs/nfsd/nfscache.c
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@ -421,10 +421,10 @@ nfsd_cache_insert(struct nfsd_drc_bucket *b, struct svc_cacherep *key,
*/
int nfsd_cache_lookup(struct svc_rqst *rqstp)
{
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
struct nfsd_net *nn;
struct svc_cacherep *rp, *found;
__wsum csum;
struct nfsd_drc_bucket *b = nfsd_cache_bucket_find(rqstp->rq_xid, nn);
struct nfsd_drc_bucket *b;
int type = rqstp->rq_cachetype;
int rtn = RC_DOIT;
@ -440,10 +440,12 @@ int nfsd_cache_lookup(struct svc_rqst *rqstp)
* Since the common case is a cache miss followed by an insert,
* preallocate an entry.
*/
nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
rp = nfsd_reply_cache_alloc(rqstp, csum, nn);
if (!rp)
goto out;
b = nfsd_cache_bucket_find(rqstp->rq_xid, nn);
spin_lock(&b->cache_lock);
found = nfsd_cache_insert(b, rp, nn);
if (found != rp) {