Re: [PATCH] powerpc: fix the allyesconfig build

[Jakub Kicinski]

On Sat, 28 Nov 2020 16:20:54 +1100 Stephen Rothwell wrote:
> On Fri, 27 Nov 2020 17:56:42 -0800 Jakub Kicinski <kuba@xxxxxxxxxx> 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).

Ah! Thanks, I don't see a reason for these to be packed. 
Looks  like an accident, there is no reason to pack anything 
past struct hclge_dbg_reg_common_msg AFAICT.

Huawei folks, would you mind sending a fix if the analysis is correct?