On Wed, 1 May 2019, David Kozub wrote:
@@ -104,6 +109,12 @@ struct opal_mbr_data {
__u8 __align[7];
};
+struct opal_mbr_done {
+ struct opal_key key;
+ __u8 done_flag;
+ __u8 __align[7];
+};
While I just copied opal_mbr_data here, I wonder what is the point of
__align in these structs. By itself it just pads the structure to have a
size that is a multiple of 8. Is this to make sure that anything that lies
past the structure is 8-bytes aligned (assuming the start is 8-bytes
aligned too), perhaps for 32bit userspace with 64bit kernel?
And if it's this, is it needed for these IOCTL structs? (I can see it
being useful for struct opal_key.)
Best regards,
David
