PPC_ALIGN
unsigned char len_ac[16 + PPC_ALIGN];
unsigned char *aclen = PTR_ALIGN((void *)len_ac, PPC_ALIGN);
u8 databuf[sizeof(struct gcm_ctx) + PPC_ALIGN];
struct gcm_ctx *gctx = PTR_ALIGN((void *)databuf, PPC_ALIGN);
u8 hashbuf[sizeof(struct Hash_ctx) + PPC_ALIGN];
struct Hash_ctx *hash = PTR_ALIGN((void *)hashbuf, PPC_ALIGN);
unsigned char ivbuf[AES_BLOCK_SIZE+PPC_ALIGN];
unsigned char *iv = PTR_ALIGN((void *)ivbuf, PPC_ALIGN);