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X-CSE-ConnectionGUID: CRd1tpeOTsWl4wzpbcej4Q== X-CSE-MsgGUID: krXbZahoSHadoxaCaIi27g== X-IronPort-AV: E=McAfee;i="6800,10657,11866"; a="86491103" X-IronPort-AV: E=Sophos;i="6.25,207,1779174000"; d="scan'208";a="86491103" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Aug 2026 13:55:49 -0700 X-CSE-ConnectionGUID: sjyg4/x3Qnejn7u3RXI6gQ== X-CSE-MsgGUID: q9PmXndAS7C1L84ORqvGCA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,207,1779174000"; d="scan'208";a="300134364" Received: from lkp-server01.sh.intel.com (HELO 6eda058d650d) ([10.239.97.150]) by orviesa001.jf.intel.com with ESMTP; 05 Aug 2026 13:55:47 -0700 Received: from kbuild by 6eda058d650d with local (Exim 4.98.2) (envelope-from ) id 1wrieP-00000000DQb-1vj9; Wed, 05 Aug 2026 20:55:45 +0000 Date: Thu, 06 Aug 2026 04:55:37 +0800 From: kernel test robot To: cros-kernel-buildreports@googlegroups.com Cc: oe-kbuild-all@lists.linux.dev Subject: [android-common:android15-6.6 1/1] fs/proc/vmcore.c:424:19: warning: 'mmap_vmcore_fault' defined but not used Message-ID: <202608060428.bNAXVSS2-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild-all@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Hi Qi, FYI, the error/warning still remains. tree: https://android.googlesource.com/kernel/common android15-6.6 head: cf8ba5678385b2b8832ed2e87c035925eb12bc4a commit: 5b548fd0d2981f8ae80b7f07019d83d3536ba13f [1/1] fs/proc: fix compile warning about variable 'vmcore_mmap_ops' config: arm-randconfig-r051-20260806 (https://download.01.org/0day-ci/archive/20260806/202608060428.bNAXVSS2-lkp@intel.com/config) compiler: arm-linux-gnueabi-gcc (GCC) 7.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260806/202608060428.bNAXVSS2-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/202608060428.bNAXVSS2-lkp@intel.com/ All warnings (new ones prefixed by >>): >> fs/proc/vmcore.c:424:19: warning: 'mmap_vmcore_fault' defined but not used [-Wunused-function] static vm_fault_t mmap_vmcore_fault(struct vm_fault *vmf) ^~~~~~~~~~~~~~~~~ vim +/mmap_vmcore_fault +424 fs/proc/vmcore.c 9cb218131de1c5 Michael Holzheu 2013-09-11 416 9cb218131de1c5 Michael Holzheu 2013-09-11 417 /* 9cb218131de1c5 Michael Holzheu 2013-09-11 418 * The vmcore fault handler uses the page cache and fills data using the 4a22fd20379ca8 Matthew Wilcox (Oracle 2022-04-29 419) * standard __read_vmcore() function. 9cb218131de1c5 Michael Holzheu 2013-09-11 420 * 9cb218131de1c5 Michael Holzheu 2013-09-11 421 * On s390 the fault handler is used for memory regions that can't be mapped 9cb218131de1c5 Michael Holzheu 2013-09-11 422 * directly with remap_pfn_range(). 9cb218131de1c5 Michael Holzheu 2013-09-11 423 */ 36f062042b0fd9 Souptick Joarder 2018-08-21 @424 static vm_fault_t mmap_vmcore_fault(struct vm_fault *vmf) 9cb218131de1c5 Michael Holzheu 2013-09-11 425 { 9cb218131de1c5 Michael Holzheu 2013-09-11 426 #ifdef CONFIG_S390 11bac80004499e Dave Jiang 2017-02-24 427 struct address_space *mapping = vmf->vma->vm_file->f_mapping; 9cb218131de1c5 Michael Holzheu 2013-09-11 428 pgoff_t index = vmf->pgoff; 4a22fd20379ca8 Matthew Wilcox (Oracle 2022-04-29 429) struct iov_iter iter; 4a22fd20379ca8 Matthew Wilcox (Oracle 2022-04-29 430) struct kvec kvec; 9cb218131de1c5 Michael Holzheu 2013-09-11 431 struct page *page; 9cb218131de1c5 Michael Holzheu 2013-09-11 432 loff_t offset; 9cb218131de1c5 Michael Holzheu 2013-09-11 433 int rc; 9cb218131de1c5 Michael Holzheu 2013-09-11 434 9cb218131de1c5 Michael Holzheu 2013-09-11 435 page = find_or_create_page(mapping, index, GFP_KERNEL); 9cb218131de1c5 Michael Holzheu 2013-09-11 436 if (!page) 9cb218131de1c5 Michael Holzheu 2013-09-11 437 return VM_FAULT_OOM; 9cb218131de1c5 Michael Holzheu 2013-09-11 438 if (!PageUptodate(page)) { 09cbfeaf1a5a67 Kirill A. Shutemov 2016-04-01 439 offset = (loff_t) index << PAGE_SHIFT; 4a22fd20379ca8 Matthew Wilcox (Oracle 2022-04-29 440) kvec.iov_base = page_address(page); 4a22fd20379ca8 Matthew Wilcox (Oracle 2022-04-29 441) kvec.iov_len = PAGE_SIZE; de4eda9de2d957 Al Viro 2022-09-15 442 iov_iter_kvec(&iter, ITER_DEST, &kvec, 1, PAGE_SIZE); 4a22fd20379ca8 Matthew Wilcox (Oracle 2022-04-29 443) 4a22fd20379ca8 Matthew Wilcox (Oracle 2022-04-29 444) rc = __read_vmcore(&iter, &offset); 9cb218131de1c5 Michael Holzheu 2013-09-11 445 if (rc < 0) { 9cb218131de1c5 Michael Holzheu 2013-09-11 446 unlock_page(page); 09cbfeaf1a5a67 Kirill A. Shutemov 2016-04-01 447 put_page(page); b5c212374c8535 Souptick Joarder 2018-10-30 448 return vmf_error(rc); 9cb218131de1c5 Michael Holzheu 2013-09-11 449 } 9cb218131de1c5 Michael Holzheu 2013-09-11 450 SetPageUptodate(page); 9cb218131de1c5 Michael Holzheu 2013-09-11 451 } 9cb218131de1c5 Michael Holzheu 2013-09-11 452 unlock_page(page); 9cb218131de1c5 Michael Holzheu 2013-09-11 453 vmf->page = page; 9cb218131de1c5 Michael Holzheu 2013-09-11 454 return 0; 9cb218131de1c5 Michael Holzheu 2013-09-11 455 #else 9cb218131de1c5 Michael Holzheu 2013-09-11 456 return VM_FAULT_SIGBUS; 9cb218131de1c5 Michael Holzheu 2013-09-11 457 #endif 9cb218131de1c5 Michael Holzheu 2013-09-11 458 } 9cb218131de1c5 Michael Holzheu 2013-09-11 459 :::::: The code at line 424 was first introduced by commit :::::: 36f062042b0fd9f8e41b97a472f52139886ca26f fs/proc/vmcore.c: use new typedef vm_fault_t :::::: TO: Souptick Joarder :::::: CC: Linus Torvalds -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki