[vfs:demo.ioctl 2/4] drivers/net//ppp/ppp_generic.c:892:46: error: 'ppp_compat_ioctl' undeclared here (not in a function); did you mean 'ppp_comp_stats'?

[kbuild test robot <lkp@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git demo.ioctl
head:   85084dbc7e5de9a17d55e9293286604e0dac23ae
commit: a791f1d776e261a5b1e6c3b40678f2865ac2a36b [2/4] move handling of ppp filter ioctls into isdn_ppp and ppp_generic
config: i386-randconfig-x005-201915 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout a791f1d776e261a5b1e6c3b40678f2865ac2a36b
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>


All errors (new ones prefixed by >>):

>> drivers/net//ppp/ppp_generic.c:892:46: error: 'ppp_compat_ioctl' undeclared here (not in a function); did you mean 'ppp_comp_stats'?
     .compat_ioctl = IS_ENABLED(CONFIG_COMPAT) ? ppp_compat_ioctl : NULL,
                                                 ^~~~~~~~~~~~~~~~
                                                 ppp_comp_stats

vim +892 drivers/net//ppp/ppp_generic.c

   885	
   886	static const struct file_operations ppp_device_fops = {
   887		.owner		= THIS_MODULE,
   888		.read		= ppp_read,
   889		.write		= ppp_write,
   890		.poll		= ppp_poll,
   891		.unlocked_ioctl	= ppp_ioctl,
 > 892		.compat_ioctl	= IS_ENABLED(CONFIG_COMPAT) ? ppp_compat_ioctl : NULL,
   893		.open		= ppp_open,
   894		.release	= ppp_release,
   895		.llseek		= noop_llseek,
   896	};
   897	

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