make it obvious in the vfsops assignment that an op isnt supported.

diff --git sys/isofs/cd9660/cd9660_extern.h sys/isofs/cd9660/cd9660_extern.h
index 2a5348e1768..bd8154a27bd 100644
--- sys/isofs/cd9660/cd9660_extern.h
+++ sys/isofs/cd9660/cd9660_extern.h
@@ -94,10 +94,8 @@ int cd9660_vptofh(struct vnode *, struct fid *);
 int cd9660_init(struct vfsconf *);
 int cd9660_check_export(struct mount *, struct mbuf *, int *,
                              struct ucred **);
-#define cd9660_sysctl ((int (*)(int *, u_int, void *, size_t *, void *, \
-                                    size_t, struct proc *))eopnotsupp)
 
-int cd9660_mountroot(void); 
+int cd9660_mountroot(void);
 
 extern const struct vops       cd9660_vops;
 extern const struct vops       cd9660_specvops;
diff --git sys/isofs/cd9660/cd9660_vfsops.c sys/isofs/cd9660/cd9660_vfsops.c
index ef0ffbbb152..b844a2ff709 100644
--- sys/isofs/cd9660/cd9660_vfsops.c
+++ sys/isofs/cd9660/cd9660_vfsops.c
@@ -72,7 +72,7 @@ const struct vfsops cd9660_vfsops = {
        .vfs_fhtovp     = cd9660_fhtovp,
        .vfs_vptofh     = cd9660_vptofh,
        .vfs_init       = cd9660_init,
-       .vfs_sysctl     = cd9660_sysctl,
+       .vfs_sysctl     = (void *)eopnotsupp,
        .vfs_checkexp   = cd9660_check_export,
 };
 
diff --git sys/msdosfs/msdosfs_vfsops.c sys/msdosfs/msdosfs_vfsops.c
index 0de37665dfd..6b90195b5e5 100644
--- sys/msdosfs/msdosfs_vfsops.c
+++ sys/msdosfs/msdosfs_vfsops.c
@@ -762,27 +762,18 @@ msdosfs_check_export(struct mount *mp, struct mbuf *nam, 
int *exflagsp,
        return (0);
 }
 
-#define msdosfs_vget ((int (*)(struct mount *, ino_t, struct vnode **)) \
-                     eopnotsupp)
-
-#define msdosfs_quotactl ((int (*)(struct mount *, int, uid_t, caddr_t, \
-                                       struct proc *))eopnotsupp)
-
-#define msdosfs_sysctl ((int (*)(int *, u_int, void *, size_t *, void *, \
-                                    size_t, struct proc *))eopnotsupp)
-
 const struct vfsops msdosfs_vfsops = {
        .vfs_mount      = msdosfs_mount,
        .vfs_start      = msdosfs_start,
        .vfs_unmount    = msdosfs_unmount,
        .vfs_root       = msdosfs_root,
-       .vfs_quotactl   = msdosfs_quotactl,
+       .vfs_quotactl   = (void *)eopnotsupp,
        .vfs_statfs     = msdosfs_statfs,
        .vfs_sync       = msdosfs_sync,
-       .vfs_vget       = msdosfs_vget,
+       .vfs_vget       = (void *)eopnotsupp,
        .vfs_fhtovp     = msdosfs_fhtovp,
        .vfs_vptofh     = msdosfs_vptofh,
        .vfs_init       = msdosfs_init,
-       .vfs_sysctl     = msdosfs_sysctl,
+       .vfs_sysctl     = (void *)eopnotsupp,
        .vfs_checkexp   = msdosfs_check_export,
 };

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