Hi Haren, kernel test robot noticed the following build warnings:
[auto build test WARNING on powerpc/next] [also build test WARNING on powerpc/fixes linus/master v6.17-rc4 next-20250905] [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/Haren-Myneni/powerpc-pseries-Define-papr-hvpipe-ioctl/20250906-235556 base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next patch link: https://lore.kernel.org/r/20250906155308.705926-5-haren%40linux.ibm.com patch subject: [PATCH v5 4/9] powerpc/pseries: Send payload with ibm,send-hvpipe-msg RTAS config: powerpc64-randconfig-r123-20250907 (https://download.01.org/0day-ci/archive/20250907/202509071638.lb0stpgx-...@intel.com/config) compiler: powerpc64-linux-gcc (GCC) 8.5.0 reproduce: (https://download.01.org/0day-ci/archive/20250907/202509071638.lb0stpgx-...@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202509071638.lb0stpgx-...@intel.com/ sparse warnings: (new ones prefixed by >>) >> arch/powerpc/platforms/pseries/papr-hvpipe.c:177:26: sparse: sparse: >> incorrect type in assignment (different base types) @@ expected unsigned >> long long [usertype] @@ got restricted __be64 [usertype] @@ arch/powerpc/platforms/pseries/papr-hvpipe.c:177:26: sparse: expected unsigned long long [usertype] arch/powerpc/platforms/pseries/papr-hvpipe.c:177:26: sparse: got restricted __be64 [usertype] arch/powerpc/platforms/pseries/papr-hvpipe.c:186:26: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] @@ got restricted __be64 [usertype] @@ arch/powerpc/platforms/pseries/papr-hvpipe.c:186:26: sparse: expected unsigned long long [usertype] arch/powerpc/platforms/pseries/papr-hvpipe.c:186:26: sparse: got restricted __be64 [usertype] arch/powerpc/platforms/pseries/papr-hvpipe.c:189:26: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] @@ got restricted __be64 [usertype] @@ arch/powerpc/platforms/pseries/papr-hvpipe.c:189:26: sparse: expected unsigned long long [usertype] arch/powerpc/platforms/pseries/papr-hvpipe.c:189:26: sparse: got restricted __be64 [usertype] arch/powerpc/platforms/pseries/papr-hvpipe.c:267:33: sparse: sparse: incorrect type in initializer (different base types) @@ expected restricted __poll_t ( *poll )( ... ) @@ got unsigned int ( * )( ... ) @@ arch/powerpc/platforms/pseries/papr-hvpipe.c:267:33: sparse: expected restricted __poll_t ( *poll )( ... ) arch/powerpc/platforms/pseries/papr-hvpipe.c:267:33: sparse: got unsigned int ( * )( ... ) vim +177 arch/powerpc/platforms/pseries/papr-hvpipe.c 118 119 /* 120 * papr_hvpipe_handle_write - Issue send HVPIPE RTAS and return 121 * the RTAS status to the user space 122 */ 123 static ssize_t papr_hvpipe_handle_write(struct file *file, 124 const char __user *buf, size_t size, loff_t *off) 125 { 126 struct hvpipe_source_info *src_info = file->private_data; 127 struct rtas_work_area *work_area, *work_buf; 128 unsigned long ret, len; 129 char *area_buf; 130 131 if (!src_info) 132 return -EIO; 133 134 /* 135 * Send HVPIPE RTAS is used to send payload to the specific 136 * source with the input parameters source ID and the payload 137 * as buffer list. Each entry in the buffer list contains 138 * address/length pair of the buffer. 139 * 140 * The buffer list format is as follows: 141 * 142 * Header (length of address/length pairs and the header length) 143 * Address of 4K buffer 1 144 * Length of 4K buffer 1 used 145 * ... 146 * Address of 4K buffer n 147 * Length of 4K buffer n used 148 * 149 * See PAPR 7.3.32.2 ibm,send-hvpipe-msg 150 * 151 * Even though can support max 1MB payload, the hypervisor 152 * supports only 4048 bytes payload at present and also 153 * just one address/length entry. 154 * 155 * writev() interface can be added in future when the 156 * hypervisor supports multiple buffer list entries. 157 */ 158 /* HVPIPE_MAX_WRITE_BUFFER_SIZE = 4048 bytes */ 159 if ((size > (HVPIPE_HDR_LEN + HVPIPE_MAX_WRITE_BUFFER_SIZE)) || 160 (size <= HVPIPE_HDR_LEN)) 161 return -EINVAL; 162 163 /* 164 * The length of (address + length) pair + the length of header 165 */ 166 len = (2 * sizeof(u64)) + sizeof(u64); 167 size -= HVPIPE_HDR_LEN; 168 buf += HVPIPE_HDR_LEN; 169 mutex_lock(&rtas_ibm_send_hvpipe_msg_lock); 170 work_area = rtas_work_area_alloc(SZ_4K); 171 if (!work_area) { 172 ret = -ENOMEM; 173 goto out; 174 } 175 area_buf = rtas_work_area_raw_buf(work_area); 176 /* header */ > 177 *(u64 *)area_buf = cpu_to_be64(len); 178 area_buf += sizeof(u64); 179 180 work_buf = rtas_work_area_alloc(SZ_4K); 181 if (!area_buf) { 182 ret = -ENOMEM; 183 goto out_work; 184 } 185 /* First buffer address */ 186 *(u64 *)area_buf = cpu_to_be64(rtas_work_area_phys(work_buf)); 187 area_buf += sizeof(u64); 188 /* First buffer address length */ 189 *(u64 *)area_buf = cpu_to_be64(size); 190 191 if (!copy_from_user(rtas_work_area_raw_buf(work_buf), buf, size)) { 192 ret = rtas_ibm_send_hvpipe_msg(work_area, src_info->srcID); 193 if (!ret) 194 ret = size + HVPIPE_HDR_LEN; 195 } else 196 ret = -EPERM; 197 198 rtas_work_area_free(work_buf); 199 out_work: 200 rtas_work_area_free(work_area); 201 out: 202 mutex_unlock(&rtas_ibm_send_hvpipe_msg_lock); 203 return ret; 204 } 205 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
