NFSD: Refactor find_file()

find_file() is now the only caller of find_file_locked(), so just
fold these two together.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>

fs/nfsd/nfs4state.c

@@ -4682,31 +4682,24 @@ move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
  nfs4_put_stid(&last->st_stid);
 }
 
-/* search file_hashtbl[] for file */
-static struct nfs4_file *
-find_file_locked(const struct svc_fh *fh, unsigned int hashval)
+static noinline_for_stack struct nfs4_file *
+nfsd4_file_hash_lookup(const struct svc_fh *fhp)
 {
- struct nfs4_file *fp;
+ unsigned int hashval = file_hashval(fhp);
+ struct nfs4_file *fi;
 
- hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash,
- lockdep_is_held(&state_lock)) {
- if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) {
- if (refcount_inc_not_zero(&fp->fi_ref))
- return fp;
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(fi, &file_hashtbl[hashval], fi_hash,
+ lockdep_is_held(&state_lock)) {
+ if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) {
+ if (refcount_inc_not_zero(&fi->fi_ref)) {
+ rcu_read_unlock();
+ return fi;
+ }
  }
  }
- return NULL;
-}
-
-static struct nfs4_file * find_file(struct svc_fh *fh)
-{
- struct nfs4_file *fp;
- unsigned int hashval = file_hashval(fh);
-
- rcu_read_lock();
- fp = find_file_locked(fh, hashval);
  rcu_read_unlock();
- return fp;
+ return NULL;
 }
 
 /*
@@ -4757,9 +4750,10 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
  struct nfs4_file *fp;
  __be32 ret = nfs_ok;
 
- fp = find_file(current_fh);
+ fp = nfsd4_file_hash_lookup(current_fh);
  if (!fp)
  return ret;
+
  /* Check for conflicting share reservations */
  spin_lock(&fp->fi_lock);
  if (fp->fi_share_deny & deny_type)