Messages in this thread | | | Date | Thu, 12 Oct 2023 23:59:29 +0800 | From | kernel test robot <> | Subject | Re: [PATCH v2] arch_topology: Support SMT control on arm64 |
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Hi Yicong,
kernel test robot noticed the following build warnings:
[auto build test WARNING on arm64/for-next/core] [also build test WARNING on driver-core/driver-core-testing driver-core/driver-core-next driver-core/driver-core-linus soc/for-next linus/master v6.6-rc5 next-20231012] [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/Yicong-Yang/arch_topology-Support-SMT-control-on-arm64/20231010-195926 base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core patch link: https://lore.kernel.org/r/20231010115335.13862-1-yangyicong%40huawei.com patch subject: [PATCH v2] arch_topology: Support SMT control on arm64 config: arm64-randconfig-004-20231012 (https://download.01.org/0day-ci/archive/20231012/202310122334.Q66kv9Wm-lkp@intel.com/config) compiler: aarch64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231012/202310122334.Q66kv9Wm-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@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202310122334.Q66kv9Wm-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from include/linux/cpumask.h:12, from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/spinlock.h:63, from include/linux/mmzone.h:8, from include/linux/gfp.h:7, from include/linux/slab.h:16, from include/linux/resource_ext.h:11, from include/linux/acpi.h:13, from drivers/base/arch_topology.c:9: In function 'bitmap_or', inlined from 'cpumask_or' at include/linux/cpumask.h:582:2, inlined from 'topology_smt_set_num_threads' at drivers/base/arch_topology.c:745:2: >> include/linux/bitmap.h:330:24: warning: 'to_visit' is used uninitialized [-Wuninitialized] 330 | *dst = *src1 | *src2; | ^~~~~ drivers/base/arch_topology.c: In function 'topology_smt_set_num_threads': drivers/base/arch_topology.c:738:23: note: 'to_visit' declared here 738 | cpumask_var_t to_visit; | ^~~~~~~~
vim +/to_visit +330 include/linux/bitmap.h
^1da177e4c3f41 Linus Torvalds 2005-04-16 325 ^1da177e4c3f41 Linus Torvalds 2005-04-16 326 static inline void bitmap_or(unsigned long *dst, const unsigned long *src1, 2f9305eb31097f Rasmus Villemoes 2014-08-06 327 const unsigned long *src2, unsigned int nbits) ^1da177e4c3f41 Linus Torvalds 2005-04-16 328 { 4b0bc0bca83f3f Rusty Russell 2008-12-30 329 if (small_const_nbits(nbits)) ^1da177e4c3f41 Linus Torvalds 2005-04-16 @330 *dst = *src1 | *src2; ^1da177e4c3f41 Linus Torvalds 2005-04-16 331 else ^1da177e4c3f41 Linus Torvalds 2005-04-16 332 __bitmap_or(dst, src1, src2, nbits); ^1da177e4c3f41 Linus Torvalds 2005-04-16 333 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 334
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