Hi Steven, kernel test robot noticed the following build warnings:
[auto build test WARNING on tip/locking/core] [also build test WARNING on trace/for-next akpm-mm/mm-everything linus/master v7.0-rc3 next-20260310] [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/Steven-Rostedt/tracing-Have-futex-syscall-trace-event-show-specific-user-data/20260311-041422 base: tip/locking/core patch link: https://lore.kernel.org/r/20260310201036.542627924%40kernel.org patch subject: [PATCH v2 1/3] tracing: Have futex syscall trace event show specific user data config: x86_64-rhel-9.4 (https://download.01.org/0day-ci/archive/20260311/[email protected]/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260311/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): kernel/trace/trace_syscalls.c: In function 'syscall_get_futex': >> kernel/trace/trace_syscalls.c:807:15: warning: variable 'buf' set but not >> used [-Wunused-but-set-variable] 807 | char *buf; | ^~~ vim +/buf +807 kernel/trace/trace_syscalls.c 801 802 static int 803 syscall_get_futex(unsigned long *args, char **buffer, int *size, int buf_size) 804 { 805 struct syscall_user_buffer *sbuf; 806 const char __user *ptr; > 807 char *buf; 808 809 /* buf_size of zero means user doesn't want user space read */ 810 if (!buf_size) 811 return -1; 812 813 /* If the syscall_buffer is NULL, tracing is being shutdown */ 814 sbuf = READ_ONCE(syscall_buffer); 815 if (!sbuf) 816 return -1; 817 818 ptr = (char __user *)args[0]; 819 820 *buffer = trace_user_fault_read(&sbuf->buf, ptr, 4, NULL, NULL); 821 if (!*buffer) 822 return -1; 823 824 /* Add room for the value */ 825 *size += 4; 826 827 buf = *buffer; 828 829 return 0; 830 } 831 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
