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Message-ID: <202608010824.vc7vATf0-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 8ba098e6b6ff0db8edf28528d1552be261af30d4 commit: b1e7a590a0133606d3efd41aee38cdeac630b52f ring-buffer: Add helper functions for allocations date: 8 months ago config: openrisc-randconfig-r062-20260801 (https://download.01.org/0day-ci/archive/20260801/202608010824.vc7vATf0-lkp@intel.com/config) compiler: or1k-linux-gcc (GCC) 9.5.0 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 | Fixes: b1e7a590a013 ("ring-buffer: Add helper functions for allocations") | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202608010824.vc7vATf0-lkp@intel.com/ cocci warnings: (new ones prefixed by >>) >> kernel/trace/ring_buffer.c:412:29-47: WARNING: casting value returned by memory allocation function to (struct buffer_page *) is useless. >> kernel/trace/ring_buffer.c:408:31-57: WARNING: casting value returned by memory allocation function to (struct ring_buffer_per_cpu *) is useless. vim +412 kernel/trace/ring_buffer.c 403 404 /* 405 * For best performance, allocate cpu buffer data cache line sized 406 * and per CPU. 407 */ > 408 #define alloc_cpu_buffer(cpu) (struct ring_buffer_per_cpu *) \ 409 kzalloc_node(ALIGN(sizeof(struct ring_buffer_per_cpu), \ 410 cache_line_size()), GFP_KERNEL, cpu_to_node(cpu)); 411 > 412 #define alloc_cpu_page(cpu) (struct buffer_page *) \ 413 kzalloc_node(ALIGN(sizeof(struct buffer_page), \ 414 cache_line_size()), GFP_KERNEL, cpu_to_node(cpu)); 415 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki