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Donenfeld" , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Ian Rogers Subject: Re: [PATCH v3 1/3] vdso: Switch get/put unaligned from packed struct to memcpy In-Reply-To: <202507050736.b4hX0Xks-lkp@intel.com> References: <20250626054826.433453-2-irogers@google.com> <202507050736.b4hX0Xks-lkp@intel.com> Date: Tue, 22 Jul 2025 17:56:25 +0200 Message-ID: <87o6tcrzh2.ffs@tglx> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Ian! On Sat, Jul 05 2025 at 08:05, kernel test robot wrote: > kernel test robot noticed the following build warnings: > > [auto build test WARNING on linus/master] > [also build test WARNING on tip/timers/vdso v6.16-rc4 next-20250704] > [cannot apply to acme/perf/core] > [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/Ian-Rogers/vdso-Switch-get-put-unaligned-from-packed-struct-to-memcpy/20250626-135005 > base: linus/master > patch link: https://lore.kernel.org/r/20250626054826.433453-2-irogers%40google.com > patch subject: [PATCH v3 1/3] vdso: Switch get/put unaligned from packed struct to memcpy > config: s390-randconfig-002-20250705 (https://download.01.org/0day-ci/archive/20250705/202507050736.b4hX0Xks-lkp@intel.com/config) > compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project 61529d9e36fa86782a2458e6bdeedf7f376ef4b5) > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250705/202507050736.b4hX0Xks-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 > | Closes: https://lore.kernel.org/oe-kbuild-all/202507050736.b4hX0Xks-lkp@intel.com/ > > All warnings (new ones prefixed by >>): > > In file included from arch/s390/boot/decompressor.c:48: > In file included from arch/s390/include/uapi/../../../../lib/decompress_unlz4.c:10: > In file included from arch/s390/include/uapi/../../../../lib/lz4/lz4_decompress.c:36: >>> arch/s390/include/uapi/../../../../lib/lz4/lz4defs.h:109:9: warning: default initialization of an object of type 'typeof (*((const U16 *)ptr))' (aka 'const unsigned short') leaves the object uninitialized [-Wdefault-const-init-var-unsafe] > 109 | return get_unaligned((const U16 *)ptr); > | ^ Any update on this one?