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>

3 files changed, 44 insertions, 21 deletions

diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c
index de7536358c7c..62f4a385177f 100644
--- a/fs/lockd/svcsubs.c
+++ b/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) {
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 6537f2c4ae44..b497c71384e8 100644
--- a/fs/nfs/direct.c
+++ b/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;
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 1bdbd4f9fdd2..8f71e766cc5d 100644
--- a/fs/nfs/write.c
+++ b/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);
 }
 
 /*