[balbi-usb:testing/next 45/57] drivers/usb/dwc2/core.c:438:13: error: static declaration of 'dwc2_clear_force_mode' follows non-static declaration

[kbuild test robot <fengguang.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git testing/next
head:   65223a0ed97c8c4b18c4899653745058f87d67e3
commit: 4caf1fe8fb537388810a4c8fecfa5324b26f80ea [45/57] usb: dwc2: Make dwc2_force_mode() static
config: i386-randconfig-x072-201806 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout 4caf1fe8fb537388810a4c8fecfa5324b26f80ea
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

>> drivers/usb/dwc2/core.c:438:13: error: static declaration of 'dwc2_clear_force_mode' follows non-static declaration
    static void dwc2_clear_force_mode(struct dwc2_hsotg *hsotg)
                ^~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/usb/dwc2/core.c:57:0:
   drivers/usb/dwc2/core.h:1101:6: note: previous declaration of 'dwc2_clear_force_mode' was here
    void dwc2_clear_force_mode(struct dwc2_hsotg *hsotg);
         ^~~~~~~~~~~~~~~~~~~~~

vim +/dwc2_clear_force_mode +438 drivers/usb/dwc2/core.c

   428	
   429	/**
   430	 * dwc2_clear_force_mode() - Clears the force mode bits.
   431	 *
   432	 * After clearing the bits, wait up to 100 ms to account for any
   433	 * potential IDDIG filter delay. We can't know if we expect this delay
   434	 * or not because the value of the connector ID status is affected by
   435	 * the force mode. We only need to call this once during probe if
   436	 * dr_mode == OTG.
   437	 */
 > 438	static void dwc2_clear_force_mode(struct dwc2_hsotg *hsotg)
   439	{
   440		u32 gusbcfg;
   441	
   442		gusbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
   443		gusbcfg &= ~GUSBCFG_FORCEHOSTMODE;
   444		gusbcfg &= ~GUSBCFG_FORCEDEVMODE;
   445		dwc2_writel(gusbcfg, hsotg->regs + GUSBCFG);
   446	
   447		if (dwc2_iddig_filter_enabled(hsotg))
   448			msleep(100);
   449	}
   450	

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