On Wed, 11 Jun 2025 13:15:40 +0800 Jason Xing <kerneljasonxing@xxxxxxxxx> wrote: > On Wed, Jun 11, 2025 at 9:42 AM kernel test robot <lkp@xxxxxxxxx> wrote: > > > > Hi Jason, > > > > kernel test robot noticed the following build warnings: > > > > [auto build test WARNING on axboe-block/for-next] > > [also build test WARNING on drm-i915/for-linux-next drm-i915/for-linux-next-fixes akpm-mm/mm-everything linus/master v6.16-rc1 next-20250610] > > [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/Jason-Xing/relayfs-abolish-prev_padding/20250610-085150 > > base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next > > patch link: https://lore.kernel.org/r/20250610004844.66688-5-kerneljasonxing%40gmail.com > > patch subject: [PATCH v4 4/5] blktrace: use rbuf->stats.full as a drop indicator in relayfs > > config: arc-randconfig-001-20250610 > > compiler: arc-linux-gcc (GCC) 12.4.0 > > reproduce (this is a W=1 build): > > > > 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/202506102340.uo7QDaVk-lkp@xxxxxxxxx/ > > > > All warnings (new ones prefixed by >>): > > > > kernel/trace/blktrace.c: In function 'blk_dropped_read': > > >> kernel/trace/blktrace.c:421:39: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'size_t' {aka 'unsigned int'} [-Wformat=] > > 421 | snprintf(buf, sizeof(buf), "%lu\n", dropped); > > | ~~^ ~~~~~~~ > > | | | > > | | size_t {aka unsigned int} > > | long unsigned int > > | %u > > Well, I suppose I will fix it in the re-spin after receiving more > comments so that I don't need to quickly respond to this minor issue. Please update the patch and send series with my reviewed-by on 1/5. BTW, size_t should use %zu. Please check Documentation/core-api/printk-formats.rst Thank you, > > Thanks, > Jason > > > > > > > vim +421 kernel/trace/blktrace.c > > > > 413 > > 414 static ssize_t blk_dropped_read(struct file *filp, char __user *buffer, > > 415 size_t count, loff_t *ppos) > > 416 { > > 417 struct blk_trace *bt = filp->private_data; > > 418 size_t dropped = relay_stats(bt->rchan, RELAY_STATS_BUF_FULL); > > 419 char buf[16]; > > 420 > > > 421 snprintf(buf, sizeof(buf), "%lu\n", dropped); > > 422 > > 423 return simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf)); > > 424 } > > 425 > > > > -- > > 0-DAY CI Kernel Test Service > > https://github.com/intel/lkp-tests/wiki -- Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
