6:52 a.m.
Hi Daniel,
[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on tip/perf/core]
[also build test WARNING on trace/for-next linux/master linus/master v5.12-rc6
next-20210408]
[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]
url:
https://github.com/0day-ci/linux/commits/Daniel-Bristot-de-Oliveira/hwlat...
base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
cface0326a6c2ae5c8f47bd466f07624b3e348a7
config: openrisc-randconfig-r013-20210408 (attached as .config)
compiler: or1k-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
#
https://github.com/0day-ci/linux/commit/a09dc6bb34fa0ac2596763b3a02857177...
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review
Daniel-Bristot-de-Oliveira/hwlat-improvements-and-osnoise-tracer/20210408-221655
git checkout a09dc6bb34fa0ac2596763b3a0285717799b57ce
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=openrisc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
kernel/trace/trace_hwlat.c: In function 'hwlat_mode_write':
> kernel/trace/trace_hwlat.c:711:6: warning: variable 'ret'
set but not used [-Wunused-but-set-variable]
711 | int ret;
| ^~~
vim +/ret +711 kernel/trace/trace_hwlat.c
691
692 /**
693 * hwlat_mode_write - Write function for "mode" entry
694 * @filp: The active open file structure
695 * @ubuf: The user buffer that contains the value to write
696 * @cnt: The maximum number of bytes to write to "file"
697 * @ppos: The current position in @file
698 *
699 * This function provides a write implementation for the "mode"
interface
700 * to the hardware latency detector. hwlatd has different operation modes.
701 * The "none" sets the allowed cpumask for a single hwlatd thread at the
702 * startup and lets the scheduler handle the migration. The default mode is
703 * the "round-robin" one, in which a single hwlatd thread runs,
migrating
704 * among the allowed CPUs in a round-robin fashion.
705 */
706 static ssize_t hwlat_mode_write(struct file *filp, const char __user *ubuf,
707 size_t cnt, loff_t *ppos)
708 {
709 const char *mode;
710 char buf[64];
711 int ret;
712 int i;
713
714 if (hwlat_busy)
715 return -EBUSY;
716
717 if (cnt >= sizeof(buf))
718 return -EINVAL;
719
720 if (copy_from_user(buf, ubuf, cnt))
721 return -EFAULT;
722
723 buf[cnt] = 0;
724
725 mode = strstrip(buf);
726
727 ret = -EINVAL;
728
729 for (i = 0; i < MODE_MAX; i++) {
730 if (strcmp(mode, thread_mode_str[i]) == 0) {
731 hwlat_data.thread_mode = i;
732 ret = cnt;
733 }
734 }
735
736 *ppos += cnt;
737
738 return cnt;
739 }
740
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org