Commit 8e5a2b98 authored Feb 21, 2019 by Dennis Zhou

percpu: update free path with correct new free region



When updating the chunk's contig_hint on the free path of a hint that
does not touch the page boundaries, it was incorrectly using the
starting offset of the free region and the block's contig_hint. This
could lead to incorrect assumptions about fit given a size and better
alignment of the start. Fix this by using (end - start) as this is only
called when updating a hint within a block.

Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>

parent fa3d493f

mm/percpu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -871,7 +871,7 @@ static void pcpu_block_update_hint_free(struct pcpu_chunk *chunk, int bit_off,
		pcpu_chunk_refresh_hint(chunk);
		else
		pcpu_chunk_update(chunk, pcpu_block_off_to_off(s_index, start),
		s_block->contig_hint);
		end - start);
		}

		/**

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