Hi Zhen, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master v6.4-rc3 next-20230525] [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/Zhen-Lei/kexec-fix-a-memory-leak-in-crash_shrink_memory/20230527-203821 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20230527123439.772-6-thunder.leizhen%40huawei.com patch subject: [PATCH 5/6] kexec: add helper __crash_shrink_memory() config: mips-randconfig-r012-20230528 (https://download.01.org/0day-ci/archive/20230528/202305280949.yYtbjy5B-lkp@xxxxxxxxx/config) compiler: mipsel-linux-gcc (GCC) 12.1.0 reproduce (this is a W=1 build): mkdir -p ~/bin wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/dea97cef503d26e05d0e11818ae44176056ddf64 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Zhen-Lei/kexec-fix-a-memory-leak-in-crash_shrink_memory/20230527-203821 git checkout dea97cef503d26e05d0e11818ae44176056ddf64 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 ~/bin/make.cross W=1 O=build_dir ARCH=mips olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 ~/bin/make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202305280949.yYtbjy5B-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> kernel/kexec_core.c:1108:5: warning: no previous prototype for '__crash_shrink_memory' [-Wmissing-prototypes] 1108 | int __crash_shrink_memory(struct resource *old_res, unsigned long new_size) | ^~~~~~~~~~~~~~~~~~~~~ vim +/__crash_shrink_memory +1108 kernel/kexec_core.c 1107 > 1108 int __crash_shrink_memory(struct resource *old_res, unsigned long new_size) 1109 { 1110 struct resource *ram_res; 1111 1112 ram_res = kzalloc(sizeof(*ram_res), GFP_KERNEL); 1113 if (!ram_res) 1114 return -ENOMEM; 1115 1116 ram_res->start = old_res->start + new_size; 1117 ram_res->end = old_res->end; 1118 ram_res->flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM; 1119 ram_res->name = "System RAM"; 1120 1121 if (!new_size) { 1122 release_resource(old_res); 1123 old_res->start = 0; 1124 old_res->end = 0; 1125 } else { 1126 crashk_res.end = ram_res->start - 1; 1127 } 1128 1129 crash_free_reserved_phys_range(ram_res->start, ram_res->end); 1130 insert_resource(&iomem_resource, ram_res); 1131 1132 return 0; 1133 } 1134 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
