Hi Sam,

I love your patch! Perhaps something to improve:

[auto build test WARNING on soc/for-next]
[also build test WARNING on sparc/master v5.10 next-20201218]
[cannot apply to sparc-next/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Sam-Ravnborg/sparc32-sunset-sun4m-and-sun4d/20201219-025354
base:   https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next
config: sparc-allyesconfig (attached as .config)
compiler: sparc64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/00216b8cb055593d3f761d58e2f167ef4b425871
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Sam-Ravnborg/sparc32-sunset-sun4m-and-sun4d/20201219-025354
        git checkout 00216b8cb055593d3f761d58e2f167ef4b425871
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sparc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from drivers/block/floppy.c:251:
>> arch/sparc/include/asm/floppy.h:200:13: warning: no previous prototype for 'sparc_floppy_irq' [-Wmissing-prototypes]
     200 | irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie)
         |             ^~~~~~~~~~~~~~~~
   In file included from drivers/block/floppy.c:251:
>> arch/sparc/include/asm/floppy.h:437:6: warning: no previous prototype for 'sun_pci_fd_dma_callback' [-Wmissing-prototypes]
     437 | void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie)
         |      ^~~~~~~~~~~~~~~~~~~~~~~


vim +/sparc_floppy_irq +200 arch/sparc/include/asm/floppy.h

   199	
 > 200	irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie)
   201	{
   202		if (likely(doing_pdma)) {
   203			void __iomem *stat = (void __iomem *) fdc_status;
   204			unsigned char *vaddr = pdma_vaddr;
   205			unsigned long size = pdma_size;
   206			u8 val;
   207	
   208			while (size) {
   209				val = readb(stat);
   210				if (unlikely(!(val & 0x80))) {
   211					pdma_vaddr = vaddr;
   212					pdma_size = size;
   213					return IRQ_HANDLED;
   214				}
   215				if (unlikely(!(val & 0x20))) {
   216					pdma_vaddr = vaddr;
   217					pdma_size = size;
   218					doing_pdma = 0;
   219					goto main_interrupt;
   220				}
   221				if (val & 0x40) {
   222					/* read */
   223					*vaddr++ = readb(stat + 1);
   224				} else {
   225					unsigned char data = *vaddr++;
   226	
   227					/* write */
   228					writeb(data, stat + 1);
   229				}
   230				size--;
   231			}
   232	
   233			pdma_vaddr = vaddr;
   234			pdma_size = size;
   235	
   236			/* Send Terminal Count pulse to floppy controller. */
   237			val = readb(auxio_register);
   238			val |= AUXIO_AUX1_FTCNT;
   239			writeb(val, auxio_register);
   240			val &= ~AUXIO_AUX1_FTCNT;
   241			writeb(val, auxio_register);
   242	
   243			doing_pdma = 0;
   244		}
   245	
   246	main_interrupt:
   247		return floppy_interrupt(irq, dev_cookie);
   248	}
   249	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org