Commit a63d4ac4 authored Sep 02, 2014 by Tejun Heo

percpu: make percpu-km set chunk->populated bitmap properly



percpu-km instantiates the whole chunk on creation and doesn't make
use of chunk->populated bitmap and leaves it as zero.  While this
currently doesn't cause any problem, the inconsistency makes it
difficult to build further logic on top of chunk->populated.  This
patch makes percpu-km fill chunk->populated on creation so that the
bitmap is always consistent.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Christoph Lameter <cl@linux.com>

parent a93ace48

mm/percpu-km.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -67,6 +67,9 @@ static struct pcpu_chunk *pcpu_create_chunk(void)

		chunk->data = pages;
		chunk->base_addr = page_address(pages) - pcpu_group_offsets[0];

		bitmap_fill(chunk->populated, nr_pages);

		return chunk;
		}

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