Hi Jakub,

On Fri, 27 Nov 2020 17:56:42 -0800 Jakub Kicinski [off-list ref] wrote:

What's the offending structure in hisilicon? I'd rather have a look
packing structs with pointers in 'em sounds questionable.

I only see these two:

$ git grep packed drivers/net/ethernet/hisilicon/
drivers/net/ethernet/hisilicon/hns/hnae.h:struct __packed hnae_desc {
drivers/net/ethernet/hisilicon/hns3/hns3_enet.h:struct __packed hns3_desc {

struct hclge_dbg_reg_type_info which is 28 bytes long due to the
included struct struct hclge_dbg_reg_common_msg (which is 12 bytes
long).  They are surrounded by #pragma pack(1)/pack().

This forces the 2 pointers in each second array element of
hclge_dbg_reg_info[] to be 4 byte aligned (where pointers are 8 bytes
long on PPC64).
-- 
Cheers,
Stephen Rothwell