Hi Wang, Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on char-misc/char-misc-testing] [also build test WARNING on arm-soc/for-next linus/master linux/master v5.7-rc3 next-20200501] [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/Wang-Wenhu/misc-new-driver-sram_uapi-for-user-level-SRAM-access/20200421-105427 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git ae83d0b416db002fe95601e7f97f64b59514d936 config: microblaze-allyesconfig (attached as .config) compiler: microblaze-linux-gcc (GCC) 9.3.0 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 COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=microblaze If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <l...@intel.com> Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/misc/sram_uapi.c: In function 'sram_uapi_ioctl': >> drivers/misc/sram_uapi.c:100:6: warning: 'type' may be used uninitialized in >> this function [-Wmaybe-uninitialized] 100 | if (cur->type == type) { | ^ drivers/misc/sram_uapi.c:188:8: note: 'type' was declared here 188 | __u32 type; | ^~~~ vim +/type +100 drivers/misc/sram_uapi.c 93 94 static struct sram_api *get_sram_api_from_type(__u32 type) 95 { 96 struct sram_api *cur; 97 98 mutex_lock(&sram_list_lock); 99 list_for_each_entry(cur, &sram_list, list) { > 100 if (cur->type == type) { 101 kref_get(&cur->kref); 102 mutex_unlock(&sram_list_lock); 103 return cur; 104 } 105 } 106 mutex_unlock(&sram_list_lock); 107 108 return NULL; 109 } 110 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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