Subject: Re: [PATCH v4 1/1] vringh: IOMEM support

From: kernel test robot <[email-masked]>
Date: Sat, 3 Jun 2023 02:13:07 +0800

Hi Shunsuke,

kernel test robot noticed the following build errors:

[auto build test ERROR on mst-vhost/linux-next]
[also build test ERROR on linus/master horms-ipvs/master v6.4-rc4 next-20230602]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Shunsuke-Mie/vringh-IOMEM-support/20230602-135351
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next
patch link:    https://lore.kernel.org/r/20230602055211.309960-2-mie%40igel.co.jp
patch subject: [PATCH v4 1/1] vringh: IOMEM support
config: i386-randconfig-i003-20230531 (https://download.01.org/0day-ci/archive/20230603/[email-masked]/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/de2a1f5220c32e953400f225aba6bd294a8d41b8
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Shunsuke-Mie/vringh-IOMEM-support/20230602-135351
        git checkout de2a1f5220c32e953400f225aba6bd294a8d41b8
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <[email-masked]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email-masked]/

All errors (new ones prefixed by >>):

   drivers/vhost/vringh.c: In function 'getu16_iomem':
>> drivers/vhost/vringh.c:1610:37: error: implicit declaration of function 'ioread16' [-Werror=implicit-function-declaration]
    1610 |         *val = vringh16_to_cpu(vrh, ioread16(p));
         |                                     ^~~~~~~~
   drivers/vhost/vringh.c: In function 'putu16_iomem':
>> drivers/vhost/vringh.c:1616:9: error: implicit declaration of function 'iowrite16' [-Werror=implicit-function-declaration]
    1616 |         iowrite16(cpu_to_vringh16(vrh, val), p);
         |         ^~~~~~~~~
   drivers/vhost/vringh.c: In function 'copydesc_iomem':
>> drivers/vhost/vringh.c:1623:9: error: implicit declaration of function 'memcpy_fromio'; did you mean 'memcpy_from_bvec'? [-Werror=implicit-function-declaration]
    1623 |         memcpy_fromio(dst, src, len);
         |         ^~~~~~~~~~~~~
         |         memcpy_from_bvec
   drivers/vhost/vringh.c: In function 'putused_iomem':
>> drivers/vhost/vringh.c:1630:9: error: implicit declaration of function 'memcpy_toio' [-Werror=implicit-function-declaration]
    1630 |         memcpy_toio(dst, src, num * sizeof(*dst));
         |         ^~~~~~~~~~~
   drivers/vhost/vringh.c: At top level:
   drivers/vhost/vringh.c:1661:5: warning: no previous prototype for 'vringh_init_iomem' [-Wmissing-prototypes]
    1661 | int vringh_init_iomem(struct vringh *vrh, u64 features, unsigned int num,
         |     ^~~~~~~~~~~~~~~~~
   drivers/vhost/vringh.c:1683:5: warning: no previous prototype for 'vringh_getdesc_iomem' [-Wmissing-prototypes]
    1683 | int vringh_getdesc_iomem(struct vringh *vrh, struct vringh_kiov *riov,
         |     ^~~~~~~~~~~~~~~~~~~~
   drivers/vhost/vringh.c:1714:9: warning: no previous prototype for 'vringh_iov_pull_iomem' [-Wmissing-prototypes]
    1714 | ssize_t vringh_iov_pull_iomem(struct vringh *vrh, struct vringh_kiov *riov,
         |         ^~~~~~~~~~~~~~~~~~~~~
   drivers/vhost/vringh.c:1729:9: warning: no previous prototype for 'vringh_iov_push_iomem' [-Wmissing-prototypes]
    1729 | ssize_t vringh_iov_push_iomem(struct vringh *vrh, struct vringh_kiov *wiov,
         |         ^~~~~~~~~~~~~~~~~~~~~
   drivers/vhost/vringh.c:1744:6: warning: no previous prototype for 'vringh_abandon_iomem' [-Wmissing-prototypes]
    1744 | void vringh_abandon_iomem(struct vringh *vrh, unsigned int num)
         |      ^~~~~~~~~~~~~~~~~~~~
   drivers/vhost/vringh.c:1759:5: warning: no previous prototype for 'vringh_complete_iomem' [-Wmissing-prototypes]
    1759 | int vringh_complete_iomem(struct vringh *vrh, u16 head, u32 len)
         |     ^~~~~~~~~~~~~~~~~~~~~
   drivers/vhost/vringh.c:1777:6: warning: no previous prototype for 'vringh_notify_enable_iomem' [-Wmissing-prototypes]
    1777 | bool vringh_notify_enable_iomem(struct vringh *vrh)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/vhost/vringh.c:1790:6: warning: no previous prototype for 'vringh_notify_disable_iomem' [-Wmissing-prototypes]
    1790 | void vringh_notify_disable_iomem(struct vringh *vrh)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/vhost/vringh.c:1802:5: warning: no previous prototype for 'vringh_need_notify_iomem' [-Wmissing-prototypes]
    1802 | int vringh_need_notify_iomem(struct vringh *vrh)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/ioread16 +1610 drivers/vhost/vringh.c

  1606	
  1607	static inline int getu16_iomem(const struct vringh *vrh, u16 *val,
  1608				       const __virtio16 *p)
  1609	{
> 1610		*val = vringh16_to_cpu(vrh, ioread16(p));
  1611		return 0;
  1612	}
  1613	
  1614	static inline int putu16_iomem(const struct vringh *vrh, __virtio16 *p, u16 val)
  1615	{
> 1616		iowrite16(cpu_to_vringh16(vrh, val), p);
  1617		return 0;
  1618	}
  1619	
  1620	static inline int copydesc_iomem(const struct vringh *vrh, void *dst,
  1621					 const void *src, size_t len)
  1622	{
> 1623		memcpy_fromio(dst, src, len);
  1624		return 0;
  1625	}
  1626	
  1627	static int putused_iomem(const struct vringh *vrh, struct vring_used_elem *dst,
  1628				 const struct vring_used_elem *src, unsigned int num)
  1629	{
> 1630		memcpy_toio(dst, src, num * sizeof(*dst));
  1631		return 0;
  1632	}
  1633	

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