On Sat, May 14, 2016 at 2:31 PM, Linus Torvalds
<torva...@linux-foundation.org> wrote:
>
> "u64" is indeed "unsigned long long" on x86 and many other
> architectures, but on alpha and ia64 it's just "unsigned long".
Actually, I take that back.
In the kernel, it seems to always be "unsigned long long", even on
alpha and ia64.
We do have a "int-l64.h" file that typedef's __u64 to be just unsigned
long, and yes, that file is included for alpha and ia64, but it seems
that that only happens when __KERNEL__ is not defined.
So it does seem like using "%ull" and u64 is fine. Not in general, but
inside the kernel it's ok.
Linus
