NFS,SUNRPC,NLM: fix unused variable warnings when CONFIG_SYSCTL is disabled

 Fix some dprintk's so that NLM, NFS client, and RPC client compile
 cleanly if CONFIG_SYSCTL is disabled.

 Test plan:
 Compile kernel with CONFIG_NFS enabled and CONFIG_SYSCTL disabled.

 Signed-off-by: Chuck Lever <cel@netapp.com>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/lockd/svcsubs.c

@@ -30,6 +30,36 @@
 static struct nlm_file *	nlm_files[FILE_NRHASH];
 static DECLARE_MUTEX(nlm_file_sema);
 
+#ifdef NFSD_DEBUG
+static inline void nlm_debug_print_fh(char *msg, struct nfs_fh *f)
+{
+	u32 *fhp = (u32*)f->data;
+
+	/* print the first 32 bytes of the fh */
+	dprintk("lockd: %s (%08x %08x %08x %08x %08x %08x %08x %08x)\n",
+		msg, fhp[0], fhp[1], fhp[2], fhp[3],
+		fhp[4], fhp[5], fhp[6], fhp[7]);
+}
+
+static inline void nlm_debug_print_file(char *msg, struct nlm_file *file)
+{
+	struct inode *inode = file->f_file->f_dentry->d_inode;
+
+	dprintk("lockd: %s %s/%ld\n",
+		msg, inode->i_sb->s_id, inode->i_ino);
+}
+#else
+static inline void nlm_debug_print_fh(char *msg, struct nfs_fh *f)
+{
+	return;
+}
+
+static inline void nlm_debug_print_file(char *msg, struct nlm_file *file)
+{
+	return;
+}
+#endif
+
 static inline unsigned int file_hash(struct nfs_fh *f)
 {
 	unsigned int tmp=0;
@@ -55,11 +85,8 @@ nlm_lookup_file(struct svc_rqst *rqstp, struct nlm_file **result,
 	struct nlm_file	*file;
 	unsigned int	hash;
 	u32		nfserr;
-	u32		*fhp = (u32*)f->data;
-
-	dprintk("lockd: nlm_file_lookup(%08x %08x %08x %08x %08x %08x)\n",
-		fhp[0], fhp[1], fhp[2], fhp[3], fhp[4], fhp[5]);
 
+	nlm_debug_print_fh("nlm_file_lookup", f);
 
 	hash = file_hash(f);
 
@@ -70,8 +97,7 @@ nlm_lookup_file(struct svc_rqst *rqstp, struct nlm_file **result,
 		if (!nfs_compare_fh(&file->f_handle, f))
 			goto found;
 
-	dprintk("lockd: creating file for (%08x %08x %08x %08x %08x %08x)\n",
-		fhp[0], fhp[1], fhp[2], fhp[3], fhp[4], fhp[5]);
+	nlm_debug_print_fh("creating file for", f);
 
 	nfserr = nlm_lck_denied_nolocks;
 	file = (struct nlm_file *) kmalloc(sizeof(*file), GFP_KERNEL);
@@ -124,11 +150,10 @@ out_free:
 static inline void
 nlm_delete_file(struct nlm_file *file)
 {
-	struct inode *inode = file->f_file->f_dentry->d_inode;
 	struct nlm_file	**fp, *f;
 
-	dprintk("lockd: closing file %s/%ld\n",
-		inode->i_sb->s_id, inode->i_ino);
+	nlm_debug_print_file("closing file", file);
+
 	fp = nlm_files + file->f_hash;
 	while ((f = *fp) != NULL) {
 		if (f == file) {

fs/nfs/direct.c

@@ -655,7 +655,6 @@ nfs_file_direct_read(struct kiocb *iocb, char __user *buf, size_t count, loff_t
 	struct file *file = iocb->ki_filp;
 	struct nfs_open_context *ctx =
 			(struct nfs_open_context *) file->private_data;
-	struct dentry *dentry = file->f_dentry;
 	struct address_space *mapping = file->f_mapping;
 	struct inode *inode = mapping->host;
 	struct iovec iov = {
@@ -664,7 +663,8 @@ nfs_file_direct_read(struct kiocb *iocb, char __user *buf, size_t count, loff_t
 	};
 
 	dprintk("nfs: direct read(%s/%s, %lu@%lu)\n",
-		dentry->d_parent->d_name.name, dentry->d_name.name,
+		file->f_dentry->d_parent->d_name.name,
+		file->f_dentry->d_name.name,
 		(unsigned long) count, (unsigned long) pos);
 
 	if (!is_sync_kiocb(iocb))
@@ -730,7 +730,6 @@ nfs_file_direct_write(struct kiocb *iocb, const char __user *buf, size_t count,
 	struct file *file = iocb->ki_filp;
 	struct nfs_open_context *ctx =
 			(struct nfs_open_context *) file->private_data;
-	struct dentry *dentry = file->f_dentry;
 	struct address_space *mapping = file->f_mapping;
 	struct inode *inode = mapping->host;
 	struct iovec iov = {
@@ -739,8 +738,9 @@ nfs_file_direct_write(struct kiocb *iocb, const char __user *buf, size_t count,
 	};
 
 	dfprintk(VFS, "nfs: direct write(%s/%s(%ld), %lu@%lu)\n",
-		dentry->d_parent->d_name.name, dentry->d_name.name,
-		inode->i_ino, (unsigned long) count, (unsigned long) pos);
+		file->f_dentry->d_parent->d_name.name,
+		file->f_dentry->d_name.name, inode->i_ino,
+		(unsigned long) count, (unsigned long) pos);
 
 	if (!is_sync_kiocb(iocb))
 		goto out;

fs/nfs/write.c

@@ -734,14 +734,14 @@ int nfs_updatepage(struct file *file, struct page *page,
 		unsigned int offset, unsigned int count)
 {
 	struct nfs_open_context *ctx = (struct nfs_open_context *)file->private_data;
-	struct dentry	*dentry = file->f_dentry;
 	struct inode	*inode = page->mapping->host;
 	struct nfs_page	*req;
 	int		status = 0;
 
 	dprintk("NFS:      nfs_updatepage(%s/%s %d@%Ld)\n",
-		dentry->d_parent->d_name.name, dentry->d_name.name,
-		count, (long long)(page_offset(page) +offset));
+		file->f_dentry->d_parent->d_name.name,
+		file->f_dentry->d_name.name, count,
+		(long long)(page_offset(page) +offset));
 
 	if (IS_SYNC(inode)) {
 		status = nfs_writepage_sync(ctx, inode, page, offset, count, 0);
@@ -850,7 +850,6 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
 		unsigned int count, unsigned int offset,
 		int how)
 {
-	struct rpc_task		*task = &data->task;
 	struct inode		*inode;
 
 	/* Set up the RPC argument and reply structs
@@ -881,7 +880,7 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
 	data->task.tk_release = nfs_writedata_release;
 
 	dprintk("NFS: %4d initiated write call (req %s/%Ld, %u bytes @ offset %Lu)\n",
-		task->tk_pid,
+		data->task.tk_pid,
 		inode->i_sb->s_id,
 		(long long)NFS_FILEID(inode),
 		count,
@@ -1217,7 +1216,6 @@ static void nfs_commit_release(struct rpc_task *task)
 static void nfs_commit_rpcsetup(struct list_head *head,
 		struct nfs_write_data *data, int how)
 {
-	struct rpc_task		*task = &data->task;
 	struct nfs_page		*first;
 	struct inode		*inode;
 
@@ -1248,7 +1246,7 @@ static void nfs_commit_rpcsetup(struct list_head *head,
 	/* Release requests */
 	data->task.tk_release = nfs_commit_release;
 	
-	dprintk("NFS: %4d initiated commit call\n", task->tk_pid);
+	dprintk("NFS: %4d initiated commit call\n", data->task.tk_pid);
 }
 
 /*

net/sunrpc/auth.c

@@ -299,11 +299,10 @@ put_rpccred(struct rpc_cred *cred)
 void
 rpcauth_unbindcred(struct rpc_task *task)
 {
-	struct rpc_auth	*auth = task->tk_auth;
 	struct rpc_cred	*cred = task->tk_msg.rpc_cred;
 
 	dprintk("RPC: %4d releasing %s cred %p\n",
-		task->tk_pid, auth->au_ops->au_name, cred);
+		task->tk_pid, task->tk_auth->au_ops->au_name, cred);
 
 	put_rpccred(cred);
 	task->tk_msg.rpc_cred = NULL;
@@ -312,22 +311,22 @@ rpcauth_unbindcred(struct rpc_task *task)
 u32 *
 rpcauth_marshcred(struct rpc_task *task, u32 *p)
 {
-	struct rpc_auth	*auth = task->tk_auth;
 	struct rpc_cred	*cred = task->tk_msg.rpc_cred;
 
 	dprintk("RPC: %4d marshaling %s cred %p\n",
-		task->tk_pid, auth->au_ops->au_name, cred);
+		task->tk_pid, task->tk_auth->au_ops->au_name, cred);
+
 	return cred->cr_ops->crmarshal(task, p);
 }
 
 u32 *
 rpcauth_checkverf(struct rpc_task *task, u32 *p)
 {
-	struct rpc_auth	*auth = task->tk_auth;
 	struct rpc_cred	*cred = task->tk_msg.rpc_cred;
 
 	dprintk("RPC: %4d validating %s cred %p\n",
-		task->tk_pid, auth->au_ops->au_name, cred);
+		task->tk_pid, task->tk_auth->au_ops->au_name, cred);
+
 	return cred->cr_ops->crvalidate(task, p);
 }
 
@@ -363,12 +362,12 @@ rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp,
 int
 rpcauth_refreshcred(struct rpc_task *task)
 {
-	struct rpc_auth	*auth = task->tk_auth;
 	struct rpc_cred	*cred = task->tk_msg.rpc_cred;
 	int err;
 
 	dprintk("RPC: %4d refreshing %s cred %p\n",
-		task->tk_pid, auth->au_ops->au_name, cred);
+		task->tk_pid, task->tk_auth->au_ops->au_name, cred);
+
 	err = cred->cr_ops->crrefresh(task);
 	if (err < 0)
 		task->tk_status = err;