On Mon, Jul 2, 2018 at 4:17 PM Mathieu Desnoyers
<mathieu.desnoyers@xxxxxxxxxxxx> wrote:
>
> Are there any kind of guarantees that a __u64 update on a 32-bit architecture
> won't be torn into something daft like byte-per-byte stores when performed
> from C code ?
Guarantees? No. Not that there are any guarantees that the same won't
happen for a plain 32-bit value either.
Will compilers generate that kind of code? I guess some crazy compiler
could simply be really bad at handling 64-bit values, and just happen
to handle 32-bit values better. So in that sense a 64-bit entity is
certainly a bit riskier. But that would be a really bad compiler, I
have to say.
Linus
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