Hi Rik, Thank you for the patch! Yet something to improve:
[auto build test ERROR on v4.17] [also build test ERROR on next-20180620] [cannot apply to tip/x86/core linus/master mmotm/master v4.18-rc1] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Rik-van-Riel/x86-tlb-mm-make-lazy-TLB-mode-even-lazier/20180621-045620 config: x86_64-randconfig-x016-201824 (attached as .config) compiler: gcc-7 (Debian 7.3.0-16) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 Note: the linux-review/Rik-van-Riel/x86-tlb-mm-make-lazy-TLB-mode-even-lazier/20180621-045620 HEAD 7f2e7d915758c367dd0515efc17af977592fa141 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): >> mm/init-mm.c:38:1: error: Only string constants are supported as >> initializers for randomized structures with flexible arrays }; ^ vim +38 mm/init-mm.c bb1f17b0 Alexey Dobriyan 2009-06-16 17 c59b389d Rik van Riel 2018-06-20 18 /* c59b389d Rik van Riel 2018-06-20 19 * For dynamically allocated mm_structs, there is a dynamically sized cpumask c59b389d Rik van Riel 2018-06-20 20 * at the end of the structure, the size of which depends on nr_cpu_ids. That c59b389d Rik van Riel 2018-06-20 21 * way we allocate only as much memory for mm_cpumask() as needed for the c59b389d Rik van Riel 2018-06-20 22 * hundreds, or thousands of processes that a system typically runs. c59b389d Rik van Riel 2018-06-20 23 * c59b389d Rik van Riel 2018-06-20 24 * Since there is only one init_mm in the entire system, keep it simple c59b389d Rik van Riel 2018-06-20 25 * and size this cpu_bitmask to NR_CPUS. c59b389d Rik van Riel 2018-06-20 26 */ bb1f17b0 Alexey Dobriyan 2009-06-16 27 struct mm_struct init_mm = { bb1f17b0 Alexey Dobriyan 2009-06-16 28 .mm_rb = RB_ROOT, bb1f17b0 Alexey Dobriyan 2009-06-16 29 .pgd = swapper_pg_dir, bb1f17b0 Alexey Dobriyan 2009-06-16 30 .mm_users = ATOMIC_INIT(2), bb1f17b0 Alexey Dobriyan 2009-06-16 31 .mm_count = ATOMIC_INIT(1), bb1f17b0 Alexey Dobriyan 2009-06-16 32 .mmap_sem = __RWSEM_INITIALIZER(init_mm.mmap_sem), bb1f17b0 Alexey Dobriyan 2009-06-16 33 .page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock), bb1f17b0 Alexey Dobriyan 2009-06-16 34 .mmlist = LIST_HEAD_INIT(init_mm.mmlist), bfedb589 Eric W. Biederman 2016-10-13 35 .user_ns = &init_user_ns, c59b389d Rik van Riel 2018-06-20 36 .cpu_bitmap = { [BITS_TO_LONGS(NR_CPUS)] = 0}, a1b200e2 Heiko Carstens 2010-08-09 37 INIT_MM_CONTEXT(init_mm) bb1f17b0 Alexey Dobriyan 2009-06-16 @38 }; :::::: The code at line 38 was first introduced by commit :::::: bb1f17b0372de93758653ca3454bc0df18dc2e5c mm: consolidate init_mm definition :::::: TO: Alexey Dobriyan <adobri...@gmail.com> :::::: CC: Linus Torvalds <torva...@linux-foundation.org> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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