CC: [email protected] CC: [email protected] TO: Arnd Bergmann <[email protected]>
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: 9 days ago :::::: commit date: 12 days 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 <[email protected]> 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 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 46 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 47 /* 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 48 * Test __damon_va_three_regions() function 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 49 * 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 50 * In case of virtual memory address spaces monitoring, DAMON converts the 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 51 * complex and dynamic memory mappings of each target task to three 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 52 * discontiguous regions which cover every mapped areas. However, the three 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 53 * regions should not include the two biggest unmapped areas in the original 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 54 * mapping, because the two biggest areas are normally the areas between 1) 17ccae8bb5c92894 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. 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 56 * Because these two unmapped areas are very huge but obviously never accessed, 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 57 * covering the region is just a waste. 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 58 * 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 59 * '__damon_va_three_regions() receives an address space of a process. It 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 60 * first identifies the start of mappings, end of mappings, and the two biggest 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 61 * unmapped areas. After that, based on the information, it constructs the 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 62 * three regions and returns. For more detail, refer to the comment of 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 63 * 'damon_init_regions_of()' function definition in 'mm/damon.c' file. 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 64 * 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 65 * For example, suppose virtual address ranges of 10-20, 20-25, 200-210, 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 66 * 210-220, 300-305, and 307-330 (Other comments represent this mappings in 17ccae8bb5c92894 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 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 68 * mapped. To cover every mappings, the three regions should start with 10, 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 69 * and end with 305. The process also has three unmapped areas, 25-200, 17ccae8bb5c92894 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 17ccae8bb5c92894 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, 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 72 * 200-220, and 300-330. 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 73 */ 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 74 static void damon_test_three_regions_in_vmas(struct kunit *test) 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 75 { 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 @76 struct damon_addr_range regions[3] = {0,}; 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 77 /* 10-20-25, 200-210-220, 300-305, 307-330 */ 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 78 struct vm_area_struct vmas[] = { 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 79 (struct vm_area_struct) {.vm_start = 10, .vm_end = 20}, 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 80 (struct vm_area_struct) {.vm_start = 20, .vm_end = 25}, 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 81 (struct vm_area_struct) {.vm_start = 200, .vm_end = 210}, 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 82 (struct vm_area_struct) {.vm_start = 210, .vm_end = 220}, 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 83 (struct vm_area_struct) {.vm_start = 300, .vm_end = 305}, 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 84 (struct vm_area_struct) {.vm_start = 307, .vm_end = 330}, 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 85 }; 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 86 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 87 __link_vmas(vmas, 6); 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 88 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 89 __damon_va_three_regions(&vmas[0], regions); 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 90 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 91 KUNIT_EXPECT_EQ(test, 10ul, regions[0].start); 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 92 KUNIT_EXPECT_EQ(test, 25ul, regions[0].end); 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 93 KUNIT_EXPECT_EQ(test, 200ul, regions[1].start); 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 94 KUNIT_EXPECT_EQ(test, 220ul, regions[1].end); 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 95 KUNIT_EXPECT_EQ(test, 300ul, regions[2].start); 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 96 KUNIT_EXPECT_EQ(test, 330ul, regions[2].end); 17ccae8bb5c92894 mm/damon/vaddr-test.h SeongJae Park 2021-09-07 97 } 17ccae8bb5c92894 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 <[email protected]> :::::: CC: Linus Torvalds <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
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