[arnd-playground:randconfig-5.15-min 80/175] mm/damon/vaddr-test.c:76:47: sparse: sparse: missing braces around initializer

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

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Arnd Bergmann <arnd@arndb.de>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git randconfig-5.15-min
head:   c471093763a746b316809f07c3114a455f37a32b
commit: 967ea466c98bfe3b29c40ecafe25190d95c57082 [80/175] damon: disable structleak plugin for kunit test
:::::: branch date: 4 weeks ago
:::::: commit date: 4 weeks ago
config: i386-randconfig-s001-20211010 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commit/?id=967ea466c98bfe3b29c40ecafe25190d95c57082
        git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git
        git fetch --no-tags arnd-playground randconfig-5.15-min
        git checkout 967ea466c98bfe3b29c40ecafe25190d95c57082
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash mm/damon/

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


sparse warnings: (new ones prefixed by >>)
>> mm/damon/vaddr-test.c:76:47: sparse: sparse: missing braces around initializer

vim +76 mm/damon/vaddr-test.c

17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  46  
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  47  /*
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  48   * Test __damon_va_three_regions() function
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  49   *
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  50   * In case of virtual memory address spaces monitoring, DAMON converts the
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  51   * complex and dynamic memory mappings of each target task to three
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  52   * discontiguous regions which cover every mapped areas.  However, the three
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  53   * regions should not include the two biggest unmapped areas in the original
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  54   * mapping, because the two biggest areas are normally the areas between 1)
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  55   * heap and the mmap()-ed regions, and 2) the mmap()-ed regions and stack.
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  56   * Because these two unmapped areas are very huge but obviously never accessed,
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  57   * covering the region is just a waste.
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  58   *
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  59   * '__damon_va_three_regions() receives an address space of a process.  It
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  60   * first identifies the start of mappings, end of mappings, and the two biggest
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  61   * unmapped areas.  After that, based on the information, it constructs the
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  62   * three regions and returns.  For more detail, refer to the comment of
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  63   * 'damon_init_regions_of()' function definition in 'mm/damon.c' file.
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  64   *
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  65   * For example, suppose virtual address ranges of 10-20, 20-25, 200-210,
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  66   * 210-220, 300-305, and 307-330 (Other comments represent this mappings in
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  67   * more short form: 10-20-25, 200-210-220, 300-305, 307-330) of a process are
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  68   * mapped.  To cover every mappings, the three regions should start with 10,
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  69   * and end with 305.  The process also has three unmapped areas, 25-200,
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  70   * 220-300, and 305-307.  Among those, 25-200 and 220-300 are the biggest two
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  71   * unmapped areas, and thus it should be converted to three regions of 10-25,
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  72   * 200-220, and 300-330.
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  73   */
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  74  static void damon_test_three_regions_in_vmas(struct kunit *test)
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  75  {
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 @76  	struct damon_addr_range regions[3] = {0,};
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  77  	/* 10-20-25, 200-210-220, 300-305, 307-330 */
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  78  	struct vm_area_struct vmas[] = {
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  79  		(struct vm_area_struct) {.vm_start = 10, .vm_end = 20},
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  80  		(struct vm_area_struct) {.vm_start = 20, .vm_end = 25},
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  81  		(struct vm_area_struct) {.vm_start = 200, .vm_end = 210},
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  82  		(struct vm_area_struct) {.vm_start = 210, .vm_end = 220},
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  83  		(struct vm_area_struct) {.vm_start = 300, .vm_end = 305},
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  84  		(struct vm_area_struct) {.vm_start = 307, .vm_end = 330},
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  85  	};
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  86  
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  87  	__link_vmas(vmas, 6);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  88  
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  89  	__damon_va_three_regions(&vmas[0], regions);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  90  
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  91  	KUNIT_EXPECT_EQ(test, 10ul, regions[0].start);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  92  	KUNIT_EXPECT_EQ(test, 25ul, regions[0].end);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  93  	KUNIT_EXPECT_EQ(test, 200ul, regions[1].start);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  94  	KUNIT_EXPECT_EQ(test, 220ul, regions[1].end);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  95  	KUNIT_EXPECT_EQ(test, 300ul, regions[2].start);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  96  	KUNIT_EXPECT_EQ(test, 330ul, regions[2].end);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  97  }
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park 2021-09-07  98  

:::::: The code at line 76 was first introduced by commit
:::::: 17ccae8bb5c928946f6f3af14626ec458f74e6ad mm/damon: add kunit tests

:::::: TO: SeongJae Park <sjpark@amazon.de>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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