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Re: Implement mode_select for atapi tape drives - round 4

On Sun, Aug 09, 2009 at 09:47:29PM +0200, Manuel Bouyer wrote:
> I don't get it. If the hardware (scsi devices in this case) defines
> a structure like e.g
> struct foo {
>       int8_t data1;
>       int32_t data2;
>       int8_t data3
>       int32_t data4;
> };
> the software on the host side will have to do misaligned accesses whatever
> we do, isn't it ? How do we avoid the compiler from padding the members
> without __packed ?

For data2 use __attribute__((__aligned__(1)))
and for data4 __attribute__((__aligned__(2)))


David Laight:

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