linux-kernel - arch/h8300/kernel/setup.c:72:26: warning: Unused variable: region [unusedVariable]

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Date:   Wed, 2 Jun 2021 17:43:41 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Mike Rapoport <rppt@...ux.ibm.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: arch/h8300/kernel/setup.c:72:26: warning: Unused variable: region
 [unusedVariable]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c2131f7e73c9e9365613e323d65c7b9e5b910f56
commit: 80c4574417ae42fe2ba6978772854dc67cfc5331 h8300, nds32, openrisc: simplify detection of memory extents
date:   8 months ago
compiler: h8300-linux-gcc (GCC) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>


cppcheck possible warnings: (new ones prefixed by >>, may not real problems)

>> arch/h8300/kernel/setup.c:72:26: warning: Unused variable: region [unusedVariable]
    struct memblock_region *region;
                            ^

vim +72 arch/h8300/kernel/setup.c

d8b0bdb444ed0e Yoshinori Sato 2015-05-11  69  
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  70  static void __init bootmem_init(void)
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  71  {
d8b0bdb444ed0e Yoshinori Sato 2015-05-11 @72  	struct memblock_region *region;
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  73  
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  74  	memory_end = memory_start = 0;
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  75  
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  76  	/* Find main memory where is the kernel */
80c4574417ae42 Mike Rapoport  2020-10-13  77  	memory_start = memblock_start_of_DRAM();
80c4574417ae42 Mike Rapoport  2020-10-13  78  	memory_end = memblock_end_of_DRAM();
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  79  
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  80  	if (!memory_end)
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  81  		panic("No memory!");
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  82  
c489dfefe739d3 Rob Herring    2018-03-16  83  	/* setup bootmem globals (we use no_bootmem, but mm still depends on this) */
c489dfefe739d3 Rob Herring    2018-03-16  84  	min_low_pfn = PFN_UP(memory_start);
80c4574417ae42 Mike Rapoport  2020-10-13  85  	max_low_pfn = PFN_DOWN(memory_end);
c489dfefe739d3 Rob Herring    2018-03-16  86  	max_pfn = max_low_pfn;
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  87  
c489dfefe739d3 Rob Herring    2018-03-16  88  	memblock_reserve(__pa(_stext), _end - _stext);
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  89  
c489dfefe739d3 Rob Herring    2018-03-16  90  	early_init_fdt_reserve_self();
c489dfefe739d3 Rob Herring    2018-03-16  91  	early_init_fdt_scan_reserved_mem();
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  92  
c489dfefe739d3 Rob Herring    2018-03-16  93  	memblock_dump_all();
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  94  }
d8b0bdb444ed0e Yoshinori Sato 2015-05-11  95  

:::::: The code at line 72 was first introduced by commit
:::::: d8b0bdb444ed0e2bd5f9d3ea7412cb90bdec58cf h8300: kernel startup

:::::: TO: Yoshinori Sato <ysato@...rs.sourceforge.jp>
:::::: CC: Yoshinori Sato <ysato@...rs.sourceforge.jp>

---
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