Commit 2286bf4e authored Sep 23, 2019 by Mike Rapoport Committed by Linus Torvalds Sep 24, 2019

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@linux.ibm.com


Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 7ea36242

init/main.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -594,7 +594,6 @@ asmlinkage __visible void __init start_kernel(void)
		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();

mm/init-mm.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)
		};

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