Re: Plan needed for switching m68k to 32-bit alignment

["Arnd Bergmann" <arnd@arndb.de>]

On Sun, Oct 27, 2024, at 06:16, Finn Thain wrote:
> On Sun, 27 Oct 2024, Thorsten Glaser wrote:
>
>> Finn Thain dixit:
>> 
>> >That would mean __alignof__(foo.b) == sizeof(foo.b) but that's not the
>> >case on my Linux/i686 system. 4 != 8:
>> >
>> >struct baa {
>> >        int a;
>> >        long long b;
>> >} foo;
>> 
>> That struct is just 12 bytes for you then?
>> 
>
> Right. i686 and m68k agree on that.

The other ones that have misaligned 'long long' variables are

arc
arm (OABI only)
csky
microblaze
nios2
openrisc
superh
i386

The 32-bit architectures that use a natural 8-byte
alignment are

arm (EABI)
parisc
mips
powerpc
riscv
s390
sparc
xtensa

m68k is the only architecture supported by linux-6.x that
does 2-byte alignment, otherwise the two seem to be equally
common.

      Arnd