5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chuck Lever <chuck.lever@xxxxxxxxxx>
[ 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@xxxxxxxxxx>
---
fs/nfsd/nfscache.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index 7880a2f2d29f6..1523d2e3dae97 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -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) {
--
2.43.0
