From: Mike Rapoport <rppt@xxxxxxxxxxxxx> Subject: mm: use CPU_BITS_NONE to initialize init_mm.cpu_bitmask Replace open-coded bitmap array initialization of init_mm.cpu_bitmask with neat CPU_BITS_NONE macro. And, since init_mm.cpu_bitmask is statically set to zero, there is no way to clear it again in start_kernel(). Link: http://lkml.kernel.org/r/1565703815-8584-1-git-send-email-rppt@xxxxxxxxxxxxx Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx> Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- init/main.c | 1 - mm/init-mm.c | 2 +- 2 files changed, 1 insertion(+), 2 deletions(-) --- a/init/main.c~mm-use-cpu_bits_none-to-initialize-init_mmcpu_bitmask +++ a/init/main.c @@ -594,7 +594,6 @@ asmlinkage __visible void __init start_k page_address_init(); pr_notice("%s", linux_banner); setup_arch(&command_line); - mm_init_cpumask(&init_mm); setup_command_line(command_line); setup_nr_cpu_ids(); setup_per_cpu_areas(); --- a/mm/init-mm.c~mm-use-cpu_bits_none-to-initialize-init_mmcpu_bitmask +++ a/mm/init-mm.c @@ -35,6 +35,6 @@ struct mm_struct init_mm = { .arg_lock = __SPIN_LOCK_UNLOCKED(init_mm.arg_lock), .mmlist = LIST_HEAD_INIT(init_mm.mmlist), .user_ns = &init_user_ns, - .cpu_bitmap = { [BITS_TO_LONGS(NR_CPUS)] = 0}, + .cpu_bitmap = CPU_BITS_NONE, INIT_MM_CONTEXT(init_mm) }; _
