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charset=us-ascii Content-Disposition: inline tree: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git mm_init/mem_init/v0.1 head: 55eb95380e481029d5e7b8b442b0fdfbe79a9d3e commit: 8708f0a685326c02e1927a7a18aa78bd58bef8b1 [10/13] dev: s390: make setup_zero_pages() use memblock config: s390-allnoconfig (https://download.01.org/0day-ci/archive/20250304/202503042241.6Jpkxc2E-lkp@intel.com/config) compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250304/202503042241.6Jpkxc2E-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/202503042241.6Jpkxc2E-lkp@intel.com/ All warnings (new ones prefixed by >>): >> arch/s390/mm/init.c:76:15: warning: unused variable 'page' [-Wunused-variable] struct page *page; ^ >> arch/s390/mm/init.c:77:6: warning: unused variable 'i' [-Wunused-variable] int i; ^ 2 warnings generated. vim +/page +76 arch/s390/mm/init.c ^1da177e4c3f41 Linus Torvalds 2005-04-16 71 0999f1193a51de Jiang Liu 2013-04-29 72 static void __init setup_zero_pages(void) 238ec4efeee446 Martin Schwidefsky 2010-10-25 73 { cb088e38aab4c7 Wei Yang 2024-08-08 74 unsigned long total_pages = memblock_estimated_nr_free_pages(); 238ec4efeee446 Martin Schwidefsky 2010-10-25 75 unsigned int order; 238ec4efeee446 Martin Schwidefsky 2010-10-25 @76 struct page *page; 238ec4efeee446 Martin Schwidefsky 2010-10-25 @77 int i; 238ec4efeee446 Martin Schwidefsky 2010-10-25 78 c7e8b2c21c6a6f Martin Schwidefsky 2015-11-10 79 /* Latest machines require a mapping granularity of 512KB */ 1f6b83e5e4d3ae Martin Schwidefsky 2015-01-14 80 order = 7; c7e8b2c21c6a6f Martin Schwidefsky 2015-11-10 81 7919e91b34316e Martin Schwidefsky 2013-02-28 82 /* Limit number of empty zero pages for small memory sizes */ 37db17c1008c84 Wei Yang 2024-06-16 83 while (order > 2 && (total_pages >> 10) < (1UL << order)) 1f6b83e5e4d3ae Martin Schwidefsky 2015-01-14 84 order--; 238ec4efeee446 Martin Schwidefsky 2010-10-25 85 8708f0a685326c Mike Rapoport (Microsoft 2025-03-03 86) empty_zero_page = (unsigned long)memblock_alloc(PAGE_SIZE << order, order); 238ec4efeee446 Martin Schwidefsky 2010-10-25 87 if (!empty_zero_page) 238ec4efeee446 Martin Schwidefsky 2010-10-25 88 panic("Out of memory in setup_zero_pages"); 238ec4efeee446 Martin Schwidefsky 2010-10-25 89 0999f1193a51de Jiang Liu 2013-04-29 90 zero_page_mask = ((PAGE_SIZE << order) - 1) & PAGE_MASK; 238ec4efeee446 Martin Schwidefsky 2010-10-25 91 } 238ec4efeee446 Martin Schwidefsky 2010-10-25 92 :::::: The code at line 76 was first introduced by commit :::::: 238ec4efeee4461d5cff2ed3e5a15a3ab850959b [S390] zero page cache synonyms :::::: TO: Martin Schwidefsky :::::: CC: Martin Schwidefsky -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki