Commit 51028c6e authored by Kai Ye's avatar Kai Ye Committed by Herbert Xu
Browse files

crypto: hisilicon/sgl - add a comment for block size initialization 



This seems "32" and "31" is obfuscating, It might be better to add a comment,
which explain it.

Signed-off-by: default avatarKai Ye <yekai13@huawei.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 07a4356b

drivers/crypto/hisilicon/sgl.c

+5 −0
Original line number Diff line number Diff line
@@ -66,6 +66,11 @@ struct hisi_acc_sgl_pool *hisi_acc_create_sgl_pool(struct device *dev, 


	sgl_size = sizeof(struct acc_hw_sge) * sge_nr +

		   sizeof(struct hisi_acc_hw_sgl);



	/*

	 * the pool may allocate a block of memory of size PAGE_SIZE * 2^(MAX_ORDER - 1),

	 * block size may exceed 2^31 on ia64, so the max of block size is 2^31

	 */

	block_size = 1 << (PAGE_SHIFT + MAX_ORDER <= 32 ?

			   PAGE_SHIFT + MAX_ORDER - 1 : 31);

	sgl_num_per_block = block_size / sgl_size;