Hi Mande, kernel test robot noticed the following build warnings: [auto build test WARNING on wireless-next/main] [also build test WARNING on wireless/main linus/master v6.16 next-20250731] [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/Mande-Imran-Ahmed/net-mac80211-replace-scnprintf-with-sysfs_emit-for-sysfs-output/20250730-180128 base: https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git main patch link: https://lore.kernel.org/r/20250730095634.3754-1-immu.ahmed1905%40gmail.com patch subject: [PATCH] net/mac80211: replace scnprintf() with sysfs_emit() for sysfs output config: powerpc-randconfig-001-20250801 (https://download.01.org/0day-ci/archive/20250801/202508011121.dDTSwRyY-lkp@xxxxxxxxx/config) compiler: powerpc-linux-gcc (GCC) 13.4.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250801/202508011121.dDTSwRyY-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202508011121.dDTSwRyY-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): net/mac80211/debugfs_sta.c: In function 'sta_flags_read': >> net/mac80211/debugfs_sta.c:99:16: warning: 'buf' is used uninitialized [-Wuninitialized] 99 | return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/string.h:65, from include/linux/bitmap.h:13, from include/linux/cpumask.h:12, from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/spinlock.h:63, from include/linux/wait.h:9, from include/linux/wait_bit.h:8, from include/linux/fs.h:7, from include/linux/debugfs.h:15, from net/mac80211/debugfs_sta.c:11: arch/powerpc/include/asm/string.h:22:24: note: by argument 1 of type 'const char *' to 'strlen' declared here 22 | extern __kernel_size_t strlen(const char *); | ^~~~~~ net/mac80211/debugfs_sta.c:87:14: note: 'buf' declared here 87 | char buf[16 * NUM_WLAN_STA_FLAGS], *pos = buf; | ^~~ vim +/buf +99 net/mac80211/debugfs_sta.c c84387d2f2c83d Johannes Berg 2016-03-17 83 e9f207f0ff90bf Jiri Benc 2007-05-05 84 static ssize_t sta_flags_read(struct file *file, char __user *userbuf, e9f207f0ff90bf Jiri Benc 2007-05-05 85 size_t count, loff_t *ppos) e9f207f0ff90bf Jiri Benc 2007-05-05 86 { c84387d2f2c83d Johannes Berg 2016-03-17 87 char buf[16 * NUM_WLAN_STA_FLAGS], *pos = buf; e9f207f0ff90bf Jiri Benc 2007-05-05 88 struct sta_info *sta = file->private_data; c84387d2f2c83d Johannes Berg 2016-03-17 89 unsigned int flg; c84387d2f2c83d Johannes Berg 2016-03-17 90 c84387d2f2c83d Johannes Berg 2016-03-17 91 BUILD_BUG_ON(ARRAY_SIZE(sta_flag_names) != NUM_WLAN_STA_FLAGS); c2c98fdeb5c897 Johannes Berg 2011-09-29 92 c84387d2f2c83d Johannes Berg 2016-03-17 93 for (flg = 0; flg < NUM_WLAN_STA_FLAGS; flg++) { c84387d2f2c83d Johannes Berg 2016-03-17 94 if (test_sta_flag(sta, flg)) ec95570844b7a6 Mande Imran Ahmed 2025-07-30 95 pos += sysfs_emit(pos, "%s\n", c84387d2f2c83d Johannes Berg 2016-03-17 96 sta_flag_names[flg]); c84387d2f2c83d Johannes Berg 2016-03-17 97 } 5bade101eceedb Johannes Berg 2011-09-29 98 c84387d2f2c83d Johannes Berg 2016-03-17 @99 return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf)); e9f207f0ff90bf Jiri Benc 2007-05-05 100 } e9f207f0ff90bf Jiri Benc 2007-05-05 101 STA_OPS(flags); e9f207f0ff90bf Jiri Benc 2007-05-05 102 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
