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b=QOScfZaHZ3az+dDuP50EvzmdN+lL8yV1bHUDHlYcjWAsL7QLDE3XzC0dRkfwZdr/q tkzFsQoAh0QnlQr2erUlAfdglfTB/KIsIcTX+Mfa8mAe48pOr8bu+FEkys4Eboxluz J2oFcJEmCXMsCJDf/BQRZjhDxVWs9otbXK2ODvX5ksOFoolvGOUktMBRGAVeImYsx+ cKBl8MJQyk4mQijeqp5yk+NU6LCNCan3LRmZiVX3mv6w2hqXuo8659s4WTS7jE0ADJ zzz5u55ggzwP2KKYkyH1uzrQgpgZnf1c3uTFd/TH1gMuPcPzZSecVnABD5GgRNAP0s ru4zV22/FXINA== Date: Tue, 4 Nov 2025 17:38:22 +0200 From: Mike Rapoport To: Pasha Tatashin Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Andrew Morton , Linux Memory Management List , kernel test robot Subject: Re: [linux-next:master 4972/5926] kernel/kexec_handover_debug.c:16:18: error: use of undeclared identifier 'kho_scratch_cnt' Message-ID: References: <202511042251.paO6f5BZ-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202511042251.paO6f5BZ-lkp@intel.com> X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: DF96F20008 X-Stat-Signature: t9ygqyc5zfnbdpjo68wmrtnamg6xshn9 X-Rspam-User: X-HE-Tag: 1762270709-696827 X-HE-Meta: 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 7kgXurdY 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: (adding Pasha) On Tue, Nov 04, 2025 at 10:48:31PM +0800, kernel test robot wrote: > Hi Mike, > > First bad commit (maybe != root cause): > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: 17490bd0527f59d841168457b245581f314b5fa0 > commit: 8c211175c3abcebb8bffce8095d78d193e482105 [4972/5926] liveupdate-kho-warn-and-fail-on-metadata-or-preserved-memory-in-scratch-area-fix > config: x86_64-randconfig-071-20251104 (https://download.01.org/0day-ci/archive/20251104/202511042251.paO6f5BZ-lkp@intel.com/config) > compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251104/202511042251.paO6f5BZ-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/202511042251.paO6f5BZ-lkp@intel.com/ > > All errors (new ones prefixed by >>): > > >> kernel/kexec_handover_debug.c:16:18: error: use of undeclared identifier 'kho_scratch_cnt' > 16 | for (i = 0; i < kho_scratch_cnt; i++) { > | ^ > >> kernel/kexec_handover_debug.c:17:19: error: use of undeclared identifier 'kho_scratch' > 17 | scratch_start = kho_scratch[i].addr; > | ^ > kernel/kexec_handover_debug.c:18:17: error: use of undeclared identifier 'kho_scratch' > 18 | scratch_end = kho_scratch[i].addr + kho_scratch[i].size; > | ^ > kernel/kexec_handover_debug.c:18:39: error: use of undeclared identifier 'kho_scratch' > 18 | scratch_end = kho_scratch[i].addr + kho_scratch[i].size; > | ^ > 4 errors generated. > > > vim +/kho_scratch_cnt +16 kernel/kexec_handover_debug.c > > 4039a00022d42a Pasha Tatashin 2025-10-20 10 > 4039a00022d42a Pasha Tatashin 2025-10-20 11 bool kho_scratch_overlap(phys_addr_t phys, size_t size) > 4039a00022d42a Pasha Tatashin 2025-10-20 12 { > 4039a00022d42a Pasha Tatashin 2025-10-20 13 phys_addr_t scratch_start, scratch_end; > 4039a00022d42a Pasha Tatashin 2025-10-20 14 unsigned int i; > 4039a00022d42a Pasha Tatashin 2025-10-20 15 > 4039a00022d42a Pasha Tatashin 2025-10-20 @16 for (i = 0; i < kho_scratch_cnt; i++) { > 4039a00022d42a Pasha Tatashin 2025-10-20 @17 scratch_start = kho_scratch[i].addr; > > :::::: The code at line 16 was first introduced by commit > :::::: 4039a00022d42ac3d68b2eea63066bc9f7ef89ce kho: warn and fail on metadata or preserved memory in scratch area > > :::::: TO: Pasha Tatashin > :::::: CC: Andrew Morton > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki -- Sincerely yours, Mike.