I reviewed the code. value initializing to zero is required. Sending the incremental patch. Parav On Tue, Jan 10, 2017 at 11:20 AM, kbuild test robot <fengguang.wu@xxxxxxxxx> wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-next > head: 9c1e67f941019907034d7e5584c891603cce2d8e > commit: 39d3e7584a686541a3295ff1624d341e669e1afc [16/18] rdmacg: Added rdma cgroup controller > config: ia64-allmodconfig (attached as .config) > compiler: ia64-linux-gcc (GCC) 6.2.0 > reproduce: > wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > git checkout 39d3e7584a686541a3295ff1624d341e669e1afc > # save the attached .config to linux build tree > make.cross ARCH=ia64 > > Note: it may well be a FALSE warning. FWIW you are at least aware of it now. > http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings > > All warnings (new ones prefixed by >>): > > kernel/cgroup/rdma.c: In function 'rdmacg_resource_read': >>> kernel/cgroup/rdma.c:526:4: warning: 'value' may be used uninitialized in this function [-Wmaybe-uninitialized] > seq_printf(sf, "%d", value); > ^~~~~~~~~~~~~~~~~~~~~~~~~~~ > kernel/cgroup/rdma.c:506:6: note: 'value' was declared here > u32 value; > ^~~~~ > > vim +/value +526 kernel/cgroup/rdma.c > > 510 for (i = 0; i < RDMACG_RESOURCE_MAX; i++) { > 511 seq_puts(sf, rdmacg_resource_names[i]); > 512 seq_putc(sf, '='); > 513 if (sf_type == RDMACG_RESOURCE_TYPE_MAX) { > 514 if (rpool) > 515 value = rpool->resources[i].max; > 516 else > 517 value = S32_MAX; > 518 } else { > 519 if (rpool) > 520 value = rpool->resources[i].usage; > 521 } > 522 > 523 if (value == S32_MAX) > 524 seq_puts(sf, RDMACG_MAX_STR); > 525 else > > 526 seq_printf(sf, "%d", value); > 527 seq_putc(sf, ' '); > 528 } > 529 } > 530 > 531 static int rdmacg_resource_read(struct seq_file *sf, void *v) > 532 { > 533 struct rdmacg_device *device; > 534 struct rdmacg_resource_pool *rpool; > > --- > 0-DAY kernel test infrastructure Open Source Technology Center > https://lists.01.org/pipermail/kbuild-all Intel Corporation -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
