nfs: Remove _U_, use ccan/compiler and UNUSED

Also, add Author and License lines to _info (ccanlint complained).
Now ccanlint can build it as a module.

ccan/nfs/Makefile

 CC=gcc
-CFLAGS=-g -O0 -Wall -W -I../.. "-D_U_=__attribute__((unused))"
+CFLAGS=-g -O0 -Wall -W -I../..
 LIBS=
 
 LIBNFS_OBJ = libnfs-raw-mount.o libnfs-raw-portmap.o libnfs-raw-nfs.o libnfs-raw-nfsacl.o mount.o nfs.o nfsacl.o portmap.o pdu.o init.o socket.o libnfs.o libnfs-sync.o

ccan/nfs/_info

@@ -9,6 +9,9 @@
  * Note: various files are generated from the XDR descriptions in the rpc/
  * directory using rpcgen.
  *
+ * Author: Ronnie Sahlberg <ronniesahlberg@gmail.com>
+ * License: GPL
+ *
  * Example:
  * #include <ccan/nfs/nfs.h>
  * #include <err.h>

ccan/nfs/libnfs-sync.c

@@ -29,6 +29,7 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <poll.h>
+#include <ccan/compiler/compiler.h>
 #include "nfs.h"
 #include "libnfs-raw.h"
 #include "rpc/mount.h"
@@ -75,7 +76,7 @@ static void wait_for_reply(struct nfs_context *nfs, struct sync_cb_data *cb_data
 /*
  * connect to the server and mount the export
  */
-static void mount_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void mount_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -108,7 +109,7 @@ int nfs_mount_sync(struct nfs_context *nfs, const char *server, const char *expo
 /*
  * stat()
  */
-static void stat_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void stat_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -146,7 +147,7 @@ int nfs_stat_sync(struct nfs_context *nfs, const char *path, struct stat *st)
 /*
  * open()
  */
-static void open_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void open_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 	struct nfsfh *fh, **nfsfh;
@@ -187,7 +188,7 @@ int nfs_open_sync(struct nfs_context *nfs, const char *path, int mode, struct nf
 /*
  * pread()
  */
-static void pread_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void pread_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 	char *buffer;
@@ -231,7 +232,7 @@ int nfs_read_sync(struct nfs_context *nfs, struct nfsfh *nfsfh, size_t count, ch
 /*
  * close()
  */
-static void close_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void close_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 	cb_data->is_finished = 1;
@@ -286,7 +287,7 @@ int nfs_fstat_sync(struct nfs_context *nfs, struct nfsfh *nfsfh, struct stat *st
 /*
  * pwrite()
  */
-static void pwrite_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void pwrite_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 	cb_data->is_finished = 1;
@@ -326,7 +327,7 @@ int nfs_write_sync(struct nfs_context *nfs, struct nfsfh *nfsfh, size_t count, c
 /*
  * fsync()
  */
-static void fsync_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void fsync_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 	cb_data->is_finished = 1;
@@ -360,7 +361,7 @@ int nfs_fsync_sync(struct nfs_context *nfs, struct nfsfh *nfsfh)
 /*
  * ftruncate()
  */
-static void ftruncate_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void ftruncate_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 	cb_data->is_finished = 1;
@@ -393,7 +394,7 @@ int nfs_ftruncate_sync(struct nfs_context *nfs, struct nfsfh *nfsfh, nfs_off_t l
 /*
  * truncate()
  */
-static void truncate_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void truncate_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 	cb_data->is_finished = 1;
@@ -428,7 +429,7 @@ int nfs_truncate_sync(struct nfs_context *nfs, const char *path, nfs_off_t lengt
 /*
  * mkdir()
  */
-static void mkdir_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void mkdir_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 	cb_data->is_finished = 1;
@@ -463,7 +464,7 @@ int nfs_mkdir_sync(struct nfs_context *nfs, const char *path)
 /*
  * rmdir()
  */
-static void rmdir_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void rmdir_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 	cb_data->is_finished = 1;
@@ -496,7 +497,7 @@ int nfs_rmdir_sync(struct nfs_context *nfs, const char *path)
 /*
  * creat()
  */
-static void creat_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void creat_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 	struct nfsfh *fh, **nfsfh;
@@ -537,7 +538,7 @@ int nfs_creat_sync(struct nfs_context *nfs, const char *path, int mode, struct n
 /*
  * unlink()
  */
-static void unlink_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void unlink_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -571,7 +572,7 @@ int nfs_unlink_sync(struct nfs_context *nfs, const char *path)
 /*
  * opendir()
  */
-static void opendir_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void opendir_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 	struct nfsdir *dir, **nfsdir;
@@ -610,7 +611,7 @@ int nfs_opendir_sync(struct nfs_context *nfs, const char *path, struct nfsdir **
 /*
  * lseek()
  */
-static void lseek_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void lseek_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -649,7 +650,7 @@ int nfs_lseek_sync(struct nfs_context *nfs, struct nfsfh *nfsfh, nfs_off_t offse
 /*
  * statvfs()
  */
-static void statvfs_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void statvfs_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -688,7 +689,7 @@ int nfs_statvfs_sync(struct nfs_context *nfs, const char *path, struct statvfs *
 /*
  * readlink()
  */
-static void readlink_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void readlink_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -732,7 +733,7 @@ int nfs_readlink_sync(struct nfs_context *nfs, const char *path, char *buf, int
 /*
  * chmod()
  */
-static void chmod_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void chmod_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -767,7 +768,7 @@ int nfs_chmod_sync(struct nfs_context *nfs, const char *path, int mode)
 /*
  * fchmod()
  */
-static void fchmod_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void fchmod_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -802,7 +803,7 @@ int nfs_fchmod_sync(struct nfs_context *nfs, struct nfsfh *nfsfh, int mode)
 /*
  * chown()
  */
-static void chown_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void chown_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -834,7 +835,7 @@ int nfs_chown_sync(struct nfs_context *nfs, const char *path, int uid, int gid)
 /*
  * fchown()
  */
-static void fchown_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void fchown_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -868,7 +869,7 @@ int nfs_fchown_sync(struct nfs_context *nfs, struct nfsfh *nfsfh, int uid, int g
 /*
  * utimes()
  */
-static void utimes_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void utimes_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -902,7 +903,7 @@ int nfs_utimes_sync(struct nfs_context *nfs, const char *path, struct timeval *t
 /*
  * utime()
  */
-static void utime_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void utime_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -937,7 +938,7 @@ int nfs_utime_sync(struct nfs_context *nfs, const char *path, struct utimbuf *ti
 /*
  * access()
  */
-static void access_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void access_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -971,7 +972,7 @@ int nfs_access_sync(struct nfs_context *nfs, const char *path, int mode)
 /*
  * symlink()
  */
-static void symlink_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void symlink_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -1005,7 +1006,7 @@ int nfs_symlink_sync(struct nfs_context *nfs, const char *oldpath, const char *n
 /*
  * rename()
  */
-static void rename_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void rename_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 
@@ -1039,7 +1040,7 @@ int nfs_rename_sync(struct nfs_context *nfs, const char *oldpath, const char *ne
 /*
  * link()
  */
-static void link_cb(int status, struct nfs_context *nfs _U_, void *data, void *private_data)
+static void link_cb(int status, struct nfs_context *nfs UNUSED, void *data, void *private_data)
 {
 	struct sync_cb_data *cb_data = private_data;
 

ccan/nfs/libnfs.c

@@ -29,6 +29,7 @@
 #include <utime.h>
 #include <unistd.h>
 #include <fcntl.h>
+#include <ccan/compiler/compiler.h>
 #include "nfs.h"
 #include "libnfs-raw.h"
 #include "rpc/mount.h"
@@ -45,7 +46,7 @@ struct nfsdir {
        struct nfsdirent *current;
 };
 
-void nfs_free_nfsdir(struct nfsdir *nfsdir)
+static void nfs_free_nfsdir(struct nfsdir *nfsdir)
 {
 	while (nfsdir->entries) {
 		struct nfsdirent *dirent = nfsdir->entries->next;
@@ -155,7 +156,7 @@ void nfs_destroy_context(struct nfs_context *nfs)
 	free(nfs);
 }
 
-void free_nfs_cb_data(struct nfs_cb_data *data)
+static void free_nfs_cb_data(struct nfs_cb_data *data)
 {
 	if (data->saved_path != NULL) {
 		free(data->saved_path);
@@ -179,7 +180,7 @@ void free_nfs_cb_data(struct nfs_cb_data *data)
 
 
 
-static void nfs_mount_10_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_mount_10_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	struct nfs_cb_data *data = private_data;
 	struct nfs_context *nfs = data->nfs;
@@ -473,7 +474,7 @@ int nfs_mount_async(struct nfs_context *nfs, const char *server, const char *exp
  * Functions to first look up a path, component by component, and then finally call a specific function once
  * the filehandle for the final component is found.
  */
-static void nfs_lookup_path_1_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_lookup_path_1_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	struct nfs_cb_data *data = private_data;
 	struct nfs_context *nfs = data->nfs;
@@ -596,7 +597,7 @@ static int nfs_lookuppath_async(struct nfs_context *nfs, const char *path, nfs_c
 /*
  * Async stat()
  */
-static void nfs_stat_1_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_stat_1_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	GETATTR3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -668,7 +669,7 @@ int nfs_stat_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *p
 /*
  * Async open()
  */
-static void nfs_open_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_open_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	ACCESS3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -781,7 +782,7 @@ int nfs_open_async(struct nfs_context *nfs, const char *path, int mode, nfs_cb c
 /*
  * Async pread()
  */
-static void nfs_pread_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_pread_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	struct nfs_cb_data *data = private_data;
 	struct nfs_context *nfs = data->nfs;
@@ -851,7 +852,7 @@ int nfs_read_async(struct nfs_context *nfs, struct nfsfh *nfsfh, size_t count, n
 /*
  * Async pwrite()
  */
-static void nfs_pwrite_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_pwrite_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	struct nfs_cb_data *data = private_data;
 	struct nfs_context *nfs = data->nfs;
@@ -972,7 +973,7 @@ int nfs_fstat_async(struct nfs_context *nfs, struct nfsfh *nfsfh, nfs_cb cb, voi
 /*
  * Async fsync()
  */
-static void nfs_fsync_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_fsync_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	struct nfs_cb_data *data = private_data;
 	struct nfs_context *nfs = data->nfs;
@@ -1032,7 +1033,7 @@ int nfs_fsync_async(struct nfs_context *nfs, struct nfsfh *nfsfh, nfs_cb cb, voi
 /*
  * Async ftruncate()
  */
-static void nfs_ftruncate_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_ftruncate_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	struct nfs_cb_data *data = private_data;
 	struct nfs_context *nfs = data->nfs;
@@ -1135,7 +1136,7 @@ int nfs_truncate_async(struct nfs_context *nfs, const char *path, nfs_off_t leng
 /*
  * Async mkdir()
  */
-static void nfs_mkdir_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_mkdir_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	MKDIR3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -1216,7 +1217,7 @@ int nfs_mkdir_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *
 /*
  * Async rmdir()
  */
-static void nfs_rmdir_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_rmdir_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	RMDIR3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -1296,7 +1297,7 @@ int nfs_rmdir_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *
 /*
  * Async creat()
  */
-static void nfs_create_2_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_create_2_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	LOOKUP3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -1344,7 +1345,7 @@ static void nfs_create_2_cb(struct rpc_context *rpc _U_, int status, void *comma
 
 
 
-static void nfs_creat_1_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_creat_1_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	CREATE3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -1428,7 +1429,7 @@ int nfs_creat_async(struct nfs_context *nfs, const char *path, int mode, nfs_cb
 /*
  * Async unlink()
  */
-static void nfs_unlink_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_unlink_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	REMOVE3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -1509,7 +1510,7 @@ int nfs_unlink_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void
 /*
  * Async opendir()
  */
-static void nfs_opendir_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_opendir_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	READDIR3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -1626,7 +1627,7 @@ int nfs_opendir_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void
 }
 
 
-struct nfsdirent *nfs_readdir(struct nfs_context *nfs _U_, struct nfsdir *nfsdir)
+struct nfsdirent *nfs_readdir(struct nfs_context *nfs UNUSED, struct nfsdir *nfsdir)
 {
 	struct nfsdirent *nfsdirent = nfsdir->current;
 
@@ -1637,7 +1638,7 @@ struct nfsdirent *nfs_readdir(struct nfs_context *nfs _U_, struct nfsdir *nfsdir
 }
 
 
-void nfs_closedir(struct nfs_context *nfs _U_, struct nfsdir *nfsdir)
+void nfs_closedir(struct nfs_context *nfs UNUSED, struct nfsdir *nfsdir)
 {
 	nfs_free_nfsdir(nfsdir);
 }
@@ -1659,7 +1660,7 @@ struct lseek_cb_data {
        void *private_data;
 };
 
-static void nfs_lseek_1_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_lseek_1_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	GETATTR3res *res;
 	struct lseek_cb_data *data = private_data;
@@ -1730,7 +1731,7 @@ int nfs_lseek_async(struct nfs_context *nfs, struct nfsfh *nfsfh, nfs_off_t offs
 /*
  * Async statvfs()
  */
-static void nfs_statvfs_1_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_statvfs_1_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	FSSTAT3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -1799,7 +1800,7 @@ int nfs_statvfs_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void
 /*
  * Async readlink()
  */
-static void nfs_readlink_1_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_readlink_1_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	READLINK3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -1856,7 +1857,7 @@ int nfs_readlink_async(struct nfs_context *nfs, const char *path, nfs_cb cb, voi
 /*
  * Async chmod()
  */
-static void nfs_chmod_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_chmod_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	struct nfs_cb_data *data = private_data;
 	struct nfs_context *nfs = data->nfs;
@@ -1955,7 +1956,7 @@ int nfs_fchmod_async(struct nfs_context *nfs, struct nfsfh *nfsfh, int mode, nfs
 /*
  * Async chown()
  */
-static void nfs_chown_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_chown_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	struct nfs_cb_data *data = private_data;
 	struct nfs_context *nfs = data->nfs;
@@ -2092,7 +2093,7 @@ int nfs_fchown_async(struct nfs_context *nfs, struct nfsfh *nfsfh, int uid, int
 /*
  * Async utimes()
  */
-static void nfs_utimes_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_utimes_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	struct nfs_cb_data *data = private_data;
 	struct nfs_context *nfs = data->nfs;
@@ -2208,7 +2209,7 @@ int nfs_utime_async(struct nfs_context *nfs, const char *path, struct utimbuf *t
 /*
  * Async access()
  */
-static void nfs_access_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_access_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	ACCESS3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -2321,7 +2322,7 @@ static void free_nfs_symlink_data(void *mem)
 	free(data);
 }
 
-static void nfs_symlink_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_symlink_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	SYMLINK3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -2447,7 +2448,7 @@ static void free_nfs_rename_data(void *mem)
 	free(data);
 }
 
-static void nfs_rename_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_rename_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	RENAME3res *res;
 	struct nfs_cb_data *data = private_data;
@@ -2603,7 +2604,7 @@ static void free_nfs_link_data(void *mem)
 	free(data);
 }
 
-static void nfs_link_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_link_cb(struct rpc_context *rpc UNUSED, int status, void *command_data, void *private_data)
 {
 	LINK3res *res;
 	struct nfs_cb_data *data = private_data;

ccan/nfs/pdu.c

@@ -19,6 +19,7 @@
 #include <strings.h>
 #include <rpc/xdr.h>
 #include <rpc/rpc_msg.h>
+#include <ccan/compiler/compiler.h>
 #include "dlinklist.h"
 #include "nfs.h"
 #include "libnfs-raw.h"
@@ -69,7 +70,7 @@ struct rpc_pdu *rpc_allocate_pdu(struct rpc_context *rpc, int program, int versi
 	return pdu;
 }
 
-void rpc_free_pdu(struct rpc_context *rpc _U_, struct rpc_pdu *pdu)
+void rpc_free_pdu(struct rpc_context *rpc UNUSED, struct rpc_pdu *pdu)
 {
 	if (pdu->outdata.data != NULL) {
 		free(pdu->outdata.data);