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    SubjectRe: [PATCH 2/5] vringh: IOTLB support
    Hi Jason,

    I love your patch! Perhaps something to improve:

    [auto build test WARNING on vhost/linux-next]
    [also build test WARNING on linux/master linus/master v5.5-rc6 next-20200117]
    [if your patch is applied to the wrong git tree, please drop us a note to help
    improve the system. BTW, we also suggest to use '--base' option to specify the
    base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

    url: https://github.com/0day-ci/linux/commits/Jason-Wang/vDPA-support/20200117-170243
    base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next
    config: sh-randconfig-a001-20200117 (attached as .config)
    compiler: sh4-linux-gcc (GCC) 7.5.0
    reproduce:
    wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
    chmod +x ~/bin/make.cross
    # save the attached .config to linux build tree
    GCC_VERSION=7.5.0 make.cross ARCH=sh

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

    All warnings (new ones prefixed by >>):

    drivers/vhost/vringh.c: In function 'copy_from_iotlb':
    >> drivers/vhost/vringh.c:1110:29: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    ret = iotlb_translate(vrh, (u64)src, len, iov, 16, VHOST_MAP_RO);
    ^
    drivers/vhost/vringh.c: In function 'copy_to_iotlb':
    drivers/vhost/vringh.c:1128:29: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    ret = iotlb_translate(vrh, (u64)dst, len, iov, 16, VHOST_MAP_WO);
    ^
    drivers/vhost/vringh.c: In function 'getu16_iotlb':
    drivers/vhost/vringh.c:1145:29: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    ret = iotlb_translate(vrh, (u64)p, sizeof(*p),
    ^
    drivers/vhost/vringh.c: In function 'putu16_iotlb':
    drivers/vhost/vringh.c:1166:29: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    ret = iotlb_translate(vrh, (u64)p, sizeof(*p),
    ^

    vim +1110 drivers/vhost/vringh.c

    1102
    1103 static inline int copy_from_iotlb(const struct vringh *vrh, void *dst,
    1104 void *src, size_t len)
    1105 {
    1106 struct iov_iter iter;
    1107 struct bio_vec iov[16];
    1108 int ret;
    1109
    > 1110 ret = iotlb_translate(vrh, (u64)src, len, iov, 16, VHOST_MAP_RO);
    1111 if (ret < 0)
    1112 return ret;
    1113
    1114 iov_iter_bvec(&iter, READ, iov, ret, len);
    1115
    1116 ret = copy_from_iter(dst, len, &iter);
    1117
    1118 return ret;
    1119 }
    1120

    ---
    0-DAY kernel test infrastructure Open Source Technology Center
    https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation
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