[android-common:android16-6.12-2026-03 0/1] mm/damon/tests/vaddr-kunit.h:69:47: sparse: sparse: missing braces around initializer

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

:::::: 
:::::: Manual check reason: "low confidence static check warning: mm/damon/tests/vaddr-kunit.h:69:47: sparse: sparse: missing braces around initializer"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: cros-kernel-buildreports@googlegroups.com

tree:   https://android.googlesource.com/kernel/common android16-6.12-2026-03
head:   2180dbfe30b8629e6fb80a5957b32630b9a51c7b
commit: 9bfbaa5e44c52422a046ce291469c8ebeb6c475d [0/1] mm/damon: move kunit tests to tests/ subdirectory with _kunit suffix
:::::: branch date: 28 hours ago
:::::: commit date: 1 year, 10 months ago
config: x86_64-randconfig-121 (https://download.01.org/0day-ci/archive/20260705/202607050104.FbKCcdx1-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260705/202607050104.FbKCcdx1-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
| Fixes: 9bfbaa5e44c5 ("mm/damon: move kunit tests to tests/ subdirectory with _kunit suffix")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202607050104.FbKCcdx1-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   mm/damon/vaddr.c: note: in included file:
>> mm/damon/tests/vaddr-kunit.h:69:47: sparse: sparse: missing braces around initializer
   mm/damon/vaddr.c: note: in included file (through include/linux/rculist.h, include/linux/dcache.h, include/linux/fs.h, include/linux/highmem.h):
   include/linux/rcupdate.h:869:25: sparse: sparse: context imbalance in 'damon_mkold_pmd_entry' - unexpected unlock
   include/linux/rcupdate.h:869:25: sparse: sparse: context imbalance in 'damon_young_pmd_entry' - unexpected unlock

vim +69 mm/damon/tests/vaddr-kunit.h

17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  38  
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  39  /*
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  40   * Test __damon_va_three_regions() function
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  41   *
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  42   * In case of virtual memory address spaces monitoring, DAMON converts the
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  43   * complex and dynamic memory mappings of each target task to three
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  44   * discontiguous regions which cover every mapped areas.  However, the three
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  45   * regions should not include the two biggest unmapped areas in the original
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  46   * mapping, because the two biggest areas are normally the areas between 1)
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  47   * 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  48   * Because these two unmapped areas are very huge but obviously never accessed,
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  49   * covering the region is just a waste.
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  50   *
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  51   * '__damon_va_three_regions() receives an address space of a process.  It
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  52   * first identifies the start of mappings, end of mappings, and the two biggest
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  53   * unmapped areas.  After that, based on the information, it constructs the
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  54   * three regions and returns.  For more detail, refer to the comment of
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  55   * 'damon_init_regions_of()' function definition in 'mm/damon.c' file.
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  56   *
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  57   * For example, suppose virtual address ranges of 10-20, 20-25, 200-210,
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  58   * 210-220, 300-305, and 307-330 (Other comments represent this mappings in
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  59   * 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  60   * mapped.  To cover every mappings, the three regions should start with 10,
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  61   * and end with 305.  The process also has three unmapped areas, 25-200,
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  62   * 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  63   * 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  64   * 200-220, and 300-330.
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  65   */
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  66  static void damon_test_three_regions_in_vmas(struct kunit *test)
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  67  {
d0cf3dd47f0d5d mm/damon/vaddr-test.h Liam R. Howlett 2022-09-06  68  	static struct mm_struct mm;
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07 @69  	struct damon_addr_range regions[3] = {0,};
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  70  	/* 10-20-25, 200-210-220, 300-305, 307-330 */
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  71  	struct vm_area_struct vmas[] = {
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  72  		(struct vm_area_struct) {.vm_start = 10, .vm_end = 20},
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  73  		(struct vm_area_struct) {.vm_start = 20, .vm_end = 25},
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  74  		(struct vm_area_struct) {.vm_start = 200, .vm_end = 210},
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  75  		(struct vm_area_struct) {.vm_start = 210, .vm_end = 220},
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  76  		(struct vm_area_struct) {.vm_start = 300, .vm_end = 305},
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  77  		(struct vm_area_struct) {.vm_start = 307, .vm_end = 330},
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  78  	};
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  79  
d0cf3dd47f0d5d mm/damon/vaddr-test.h Liam R. Howlett 2022-09-06  80  	mt_init_flags(&mm.mm_mt, MM_MT_FLAGS);
34403fa579514a mm/damon/vaddr-test.h Liam R. Howlett 2023-01-20  81  	if (__link_vmas(&mm.mm_mt, vmas, ARRAY_SIZE(vmas)))
34403fa579514a mm/damon/vaddr-test.h Liam R. Howlett 2023-01-20  82  		kunit_skip(test, "Failed to create VMA tree");
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  83  
d0cf3dd47f0d5d mm/damon/vaddr-test.h Liam R. Howlett 2022-09-06  84  	__damon_va_three_regions(&mm, regions);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  85  
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  86  	KUNIT_EXPECT_EQ(test, 10ul, regions[0].start);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  87  	KUNIT_EXPECT_EQ(test, 25ul, regions[0].end);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  88  	KUNIT_EXPECT_EQ(test, 200ul, regions[1].start);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  89  	KUNIT_EXPECT_EQ(test, 220ul, regions[1].end);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  90  	KUNIT_EXPECT_EQ(test, 300ul, regions[2].start);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  91  	KUNIT_EXPECT_EQ(test, 330ul, regions[2].end);
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  92  }
17ccae8bb5c928 mm/damon/vaddr-test.h SeongJae Park   2021-09-07  93  

:::::: The code at line 69 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
https://github.com/intel/lkp-tests/wiki