[rppt:mm_init/mem_init/v0.1 10/13] arch/s390/mm/init.c:76:15: warning: unused variable 'page'

[kernel test robot <lkp@intel.com>]

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 <lkp@intel.com>
| 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 <schwidefsky@de.ibm.com>
:::::: CC: Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>

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