From: Gustavo A. R. Silva Date: Thu, 8 Aug 2024 22:05:26 +0000 (-0600) Subject: crypto: qat - Use static_assert() to check struct sizes X-Git-Tag: microblaze-v6.13~81^2~71 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=8caa061cfdf65bca9a3ceb4ce2b2b8e5fb98c1e8;p=linux-2.6-microblaze.git crypto: qat - Use static_assert() to check struct sizes Commit 140e4c85d540 ("crypto: qat - Avoid -Wflex-array-member-not-at-end warnings") introduced tagged `struct qat_alg_buf_list_hdr`. We want to ensure that when new members need to be added to the flexible structure, they are always included within this tagged struct. So, we use `static_assert()` to ensure that the memory layout for both the flexible structure and the tagged struct is the same after any changes. Signed-off-by: Gustavo A. R. Silva Acked-by: Giovanni Cabiddu Signed-off-by: Herbert Xu --- diff --git a/drivers/crypto/intel/qat/qat_common/qat_bl.h b/drivers/crypto/intel/qat/qat_common/qat_bl.h index 85bc32a9ec0e..3f5b79015400 100644 --- a/drivers/crypto/intel/qat/qat_common/qat_bl.h +++ b/drivers/crypto/intel/qat/qat_common/qat_bl.h @@ -23,6 +23,8 @@ struct qat_alg_buf_list { ); struct qat_alg_buf buffers[]; } __packed; +static_assert(offsetof(struct qat_alg_buf_list, buffers) == sizeof(struct qat_alg_buf_list_hdr), + "struct member likely outside of __struct_group()"); struct qat_alg_fixed_buf_list { struct qat_alg_buf_list_hdr sgl_hdr;