Re: [PATCH 17/19] y2038: use __kernel_timespec in sys_futex

[Thomas Gleixner]

On Wed, 6 May 2015, Arnd Bergmann wrote:

> Conversion for sys_futex is particularly easy, we can use the unmodified
> compat_sys_futex on 32-bit systems to provide compatibility for 32-bit
> time_t, and change sys_futex to pass a __kernel_timespec, which matches
> what future libc implementations will use as their struct timespec.

Unless I'm missing something I doubt that you get away that easy. It
works on 32bit, but not on 64 bit with 32bit app support:

Native 64bit: 	   sys_futex()
32bit timespec32:  compat_sys_futex()
32bit timespec64:  ?????

You cannot map that to sys_futex() because the pointer size differs.
 
Thanks,

	tglx
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