[vfs:work.poll-annotations 16/20] drivers/bluetooth/hci_ldisc.c:754:17: error: two or more data types in declaration specifiers

[kbuild test robot <fengguang.wu@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.poll-annotations
head:   57e25c0e9f495cfad818eacf944f83683b7576b3
commit: e273678a6de4dbdae89adbde4c784885f07ea968 [16/20] annotate tty
config: x86_64-randconfig-x012-201548 (attached as .config)
reproduce:
        git checkout e273678a6de4dbdae89adbde4c784885f07ea968
        # save the attached .config to linux build tree
        make ARCH=x86_64 

Note: the vfs/work.poll-annotations HEAD 57e25c0e9f495cfad818eacf944f83683b7576b3 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

>> drivers/bluetooth/hci_ldisc.c:754:17: error: two or more data types in declaration specifiers
    static __poll_t int hci_uart_tty_poll(struct tty_struct *tty,
                    ^

vim +754 drivers/bluetooth/hci_ldisc.c

   748	static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file,
   749					  const unsigned char *data, size_t count)
   750	{
   751		return 0;
   752	}
   753	
 > 754	static __poll_t int hci_uart_tty_poll(struct tty_struct *tty,
   755					      struct file *filp, poll_table *wait)
   756	{
   757		return 0;

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