[RFC PATCH] AARCH64/ILP32: introduce kernel time types

[Yury Norov]

On Tue, Jun 28, 2016 at 10:51:49AM +0200, Florian Weimer wrote:
> On 06/28/2016 10:44 AM, Yury Norov wrote:
> >Structures utmp and utmpx are shared between ilp32 and native ABIs,
> >and so should have same layout. As now, architectures where this
> >compatibility is required enable __WORDSIZE_TIME64_COMPAT32 option,
> >and so make lp64 utmp{x} backward-compatible to ilp32 ones.
> >
> >AARCH64 doesn't require such compatibility, and so we can do opposite
> >conversion.
> 
> Thanks, I agree this is the right way forward.
> 
> >This patch introduces new option  __KERNEL_TIME_T_MATCHES_TIME64_T,
> 
> >+struct __kernel_timeval
> >+  {
> >+    __ktime_t tv_sec;		/* Seconds.  */
> >+    __ksuseconds_t tv_usec;	/* Microseconds.  */
> >+  };
> 
> We rarely use the __KERNEL_ and __kernel_ prefixes, but the kernel uapi
> includes do.  I would suggest to use a different prefix.

__kernel_time_t is already imported from linux headers. It is defined
wrong, at least for arm64, and is not used. I don't want to touch it,
as I am not sure other C libraries don't use it.

> 
> Thanks,
> Florian