Hi, Thank you for the patch! Yet something to improve: [auto build test ERROR on net-next/master] [also build test ERROR on net/master horms-ipvs/master linus/master v5.17-rc1 next-20220128] [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/cgel-zte-gmail-com/net-802-use-struct_size-over-open-coded-arithmetic/20220128-160925 base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 72d044e4bfa6bd9096536e2e1c62aecfe1a525e4 config: riscv-randconfig-r042-20220124 (https://download.01.org/0day-ci/archive/20220128/202201282017.0TQvVTtf-lkp@intel.com/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 33b45ee44b1f32ffdbc995e6fec806271b4b3ba4) 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 # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/0day-ci/linux/commit/9b64e5078d3d779fc56432d43129479f63996c74 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review cgel-zte-gmail-com/net-802-use-struct_size-over-open-coded-arithmetic/20220128-160925 git checkout 9b64e5078d3d779fc56432d43129479f63996c74 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/net/wireless/ath/wcn36xx/ net/802/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): >> net/802/garp.c:187:17: error: member reference type 'struct garp_attr' is not a pointer; did you mean to use '.'? attr = kmalloc(struct_size(*attr, data, len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:18: note: expanded from macro 'struct_size' sizeof(*(p)->member) + __must_be_array((p)->member),\ ~~~^ >> net/802/garp.c:187:17: error: indirection requires pointer operand ('unsigned char[]' invalid) attr = kmalloc(struct_size(*attr, data, len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:14: note: expanded from macro 'struct_size' sizeof(*(p)->member) + __must_be_array((p)->member),\ ^~~~~~~~~~~~ >> net/802/garp.c:187:17: error: member reference type 'struct garp_attr' is not a pointer; did you mean to use '.'? attr = kmalloc(struct_size(*attr, data, len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:49: note: expanded from macro 'struct_size' sizeof(*(p)->member) + __must_be_array((p)->member),\ ~~~~~~~~~~~~~~~~~~~^~~~~~~~~ include/linux/compiler.h:258:59: note: expanded from macro '__must_be_array' #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ include/linux/compiler_types.h:287:63: note: expanded from macro '__same_type' #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) ^ include/linux/build_bug.h:16:62: note: expanded from macro 'BUILD_BUG_ON_ZERO' #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) ^ >> net/802/garp.c:187:17: error: member reference type 'struct garp_attr' is not a pointer; did you mean to use '.'? attr = kmalloc(struct_size(*attr, data, len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:49: note: expanded from macro 'struct_size' sizeof(*(p)->member) + __must_be_array((p)->member),\ ~~~~~~~~~~~~~~~~~~~^~~~~~~~~ include/linux/compiler.h:258:65: note: expanded from macro '__must_be_array' #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ include/linux/compiler_types.h:287:74: note: expanded from macro '__same_type' #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) ^ include/linux/build_bug.h:16:62: note: expanded from macro 'BUILD_BUG_ON_ZERO' #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) ^ >> net/802/garp.c:187:17: error: indirection requires pointer operand ('struct garp_attr' invalid) attr = kmalloc(struct_size(*attr, data, len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:195:14: note: expanded from macro 'struct_size' sizeof(*(p))) ^~~~ 5 errors generated. -- >> net/802/mrp.c:276:17: error: member reference type 'struct mrp_attr' is not a pointer; did you mean to use '.'? attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:18: note: expanded from macro 'struct_size' sizeof(*(p)->member) + __must_be_array((p)->member),\ ~~~^ >> net/802/mrp.c:276:17: error: indirection requires pointer operand ('unsigned char[]' invalid) attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:14: note: expanded from macro 'struct_size' sizeof(*(p)->member) + __must_be_array((p)->member),\ ^~~~~~~~~~~~ >> net/802/mrp.c:276:17: error: member reference type 'struct mrp_attr' is not a pointer; did you mean to use '.'? attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:49: note: expanded from macro 'struct_size' sizeof(*(p)->member) + __must_be_array((p)->member),\ ~~~~~~~~~~~~~~~~~~~^~~~~~~~~ include/linux/compiler.h:258:59: note: expanded from macro '__must_be_array' #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ include/linux/compiler_types.h:287:63: note: expanded from macro '__same_type' #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) ^ include/linux/build_bug.h:16:62: note: expanded from macro 'BUILD_BUG_ON_ZERO' #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) ^ >> net/802/mrp.c:276:17: error: member reference type 'struct mrp_attr' is not a pointer; did you mean to use '.'? attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:49: note: expanded from macro 'struct_size' sizeof(*(p)->member) + __must_be_array((p)->member),\ ~~~~~~~~~~~~~~~~~~~^~~~~~~~~ include/linux/compiler.h:258:65: note: expanded from macro '__must_be_array' #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ include/linux/compiler_types.h:287:74: note: expanded from macro '__same_type' #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) ^ include/linux/build_bug.h:16:62: note: expanded from macro 'BUILD_BUG_ON_ZERO' #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) ^ >> net/802/mrp.c:276:17: error: indirection requires pointer operand ('struct mrp_attr' invalid) attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:195:14: note: expanded from macro 'struct_size' sizeof(*(p))) ^~~~ 5 errors generated. vim +187 net/802/garp.c 166 167 static struct garp_attr *garp_attr_create(struct garp_applicant *app, 168 const void *data, u8 len, u8 type) 169 { 170 struct rb_node *parent = NULL, **p = &app->gid.rb_node; 171 struct garp_attr *attr; 172 int d; 173 174 while (*p) { 175 parent = *p; 176 attr = rb_entry(parent, struct garp_attr, node); 177 d = garp_attr_cmp(attr, data, len, type); 178 if (d > 0) 179 p = &parent->rb_left; 180 else if (d < 0) 181 p = &parent->rb_right; 182 else { 183 /* The attribute already exists; re-use it. */ 184 return attr; 185 } 186 } > 187 attr = kmalloc(struct_size(*attr, data, len), GFP_ATOMIC); 188 if (!attr) 189 return attr; 190 attr->state = GARP_APPLICANT_VO; 191 attr->type = type; 192 attr->dlen = len; 193 memcpy(attr->data, data, len); 194 195 rb_link_node(&attr->node, parent, p); 196 rb_insert_color(&attr->node, &app->gid); 197 return attr; 198 } 199 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org