[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <202402061809.T2cv9J8W-lkp@intel.com>
Date: Tue, 6 Feb 2024 18:52:51 +0800
From: kernel test robot <lkp@...el.com>
To: Vincent Donnefort <vdonnefort@...gle.com>, rostedt@...dmis.org,
mhiramat@...nel.org, linux-kernel@...r.kernel.org,
linux-trace-kernel@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev, mathieu.desnoyers@...icios.com,
kernel-team@...roid.com, Vincent Donnefort <vdonnefort@...gle.com>
Subject: Re: [PATCH v14 4/6] tracing: Allow user-space mapping of the
ring-buffer
Hi Vincent,
kernel test robot noticed the following build warnings:
[auto build test WARNING on e2412e51fdea837b50ce31fea8e5dfc885237f3a]
url: https://github.com/intel-lab-lkp/linux/commits/Vincent-Donnefort/ring-buffer-Zero-ring-buffer-sub-buffers/20240206-004413
base: e2412e51fdea837b50ce31fea8e5dfc885237f3a
patch link: https://lore.kernel.org/r/20240205163410.2296552-5-vdonnefort%40google.com
patch subject: [PATCH v14 4/6] tracing: Allow user-space mapping of the ring-buffer
config: arc-defconfig (https://download.01.org/0day-ci/archive/20240206/202402061809.T2cv9J8W-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240206/202402061809.T2cv9J8W-lkp@intel.com/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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402061809.T2cv9J8W-lkp@intel.com/
All warnings (new ones prefixed by >>):
kernel/trace/trace.c: In function 'tracing_buffers_mmap_close':
>> kernel/trace/trace.c:8722:29: warning: unused variable 'tr' [-Wunused-variable]
8722 | struct trace_array *tr = iter->tr;
| ^~
kernel/trace/trace.c: In function 'tracing_buffers_mmap':
kernel/trace/trace.c:8752:29: warning: unused variable 'tr' [-Wunused-variable]
8752 | struct trace_array *tr = iter->tr;
| ^~
vim +/tr +8722 kernel/trace/trace.c
8717
8718 static void tracing_buffers_mmap_close(struct vm_area_struct *vma)
8719 {
8720 struct ftrace_buffer_info *info = vma->vm_file->private_data;
8721 struct trace_iterator *iter = &info->iter;
> 8722 struct trace_array *tr = iter->tr;
8723
8724 ring_buffer_unmap(iter->array_buffer->buffer, iter->cpu_file);
8725
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Powered by blists - more mailing lists