Commit 8e5a2b98 authored by Dennis Zhou's avatar Dennis Zhou
Browse files

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: default avatarDennis Zhou <dennis@kernel.org>
Reviewed-by: default avatarPeng 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);

}



/**