percpu: implmeent pcpu_nr_empty_pop_pages and chunk->nr_populated

pcpu_nr_empty_pop_pages counts the number of empty populated pages
across all chunks and chunk->nr_populated counts the number of
populated pages in a chunk.  Both will be used to implement pre/async
population for atomic allocations.

pcpu_chunk_[de]populated() are added to update chunk->populated,
chunk->nr_populated and pcpu_nr_empty_pop_pages together.  All
successful chunk [de]populations should be followed by the
corresponding pcpu_chunk_[de]populated() calls.

Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/percpu-km.c b/mm/percpu-km.c
index e662b4947a65..10e3d0b8a86d 100644
--- a/mm/percpu-km.c
+++ b/mm/percpu-km.c
@@ -69,7 +69,7 @@ static struct pcpu_chunk *pcpu_create_chunk(void)
 	chunk->base_addr = page_address(pages) - pcpu_group_offsets[0];
 
 	spin_lock_irq(&pcpu_lock);
-	bitmap_fill(chunk->populated, nr_pages);
+	pcpu_chunk_populated(chunk, 0, nr_pages);
 	spin_unlock_irq(&pcpu_lock);
 
 	return chunk;