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 <[email protected]> --- mm/percpu-km.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/percpu-km.c b/mm/percpu-km.c index a6e34bc..67a971b 100644 --- a/mm/percpu-km.c +++ b/mm/percpu-km.c @@ -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; } -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
