[PATCH] knfsd: nfsd4: idmap initialization

Adopt standard kernel style by defining a no-op function instead of putting
ifdef's in the code where the function is called.

Signed-off-by: J. Bruce Fields <[e-mail]>
Signed-off-by: Neil Brown <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/nfsd/nfsctl.c

···
 	nfsd_export_init();	/* Exports table */
 	nfsd_lockd_init();	/* lockd->nfsd callbacks */
 	nfs4_state_init();	/* NFSv4 locking state */
-#ifdef CONFIG_NFSD_V4
 	nfsd_idmap_init();      /* Name to ID mapping */
-#endif /* CONFIG_NFSD_V4 */
 	if (proc_mkdir("fs/nfs", NULL)) {
 		struct proc_dir_entry *entry;
 		entry = create_proc_entry("fs/nfs/exports", 0, NULL);
···
 	remove_proc_entry("fs/nfs", NULL);
 	nfsd_stat_shutdown();
 	nfsd_lockd_shutdown();
-#ifdef CONFIG_NFSD_V4
 	nfsd_idmap_shutdown();
-#endif /* CONFIG_NFSD_V4 */
 	unregister_filesystem(&nfsd_fs_type);
 }
 

include/linux/nfsd_idmap.h

···
 /* XXX from linux/nfs_idmap.h */
 #define IDMAP_NAMESZ 128
 
+#ifdef CONFIG_NFSD_V4
 void nfsd_idmap_init(void);
 void nfsd_idmap_shutdown(void);
+#else
+static inline void nfsd_idmap_init(void) {};
+static inline void nfsd_idmap_shutdown(void) {};
+#endif
 
 int nfsd_map_name_to_uid(struct svc_rqst *, const char *, size_t, __u32 *);
 int nfsd_map_name_to_gid(struct svc_rqst *, const char *, size_t, __u32 *);