cpuset: Add compat shim to the sched_affinity functions

[dchagin]

Summary

To allow to run a new world on the pre 1400079 kernel a compat shims to
the sched_affinity functions has beed added. PID_MAX is hardcoded as our
kernel does not expose it to the user space.

Reported by: antoine
Tested by: antoine

[kib]

lib/libc/gen/sched_getaffinity.c

37

Look at sys/param.h P_OSREL_XXX macros.

[dchagin]

better (beauty) naming, thanks)

[kib]

In D38555#877823, @dchagin wrote:

better (beauty) naming, thanks)

Um, I mean that you should add your P_OSREL value to sys/param.h

[dchagin]

In D38555#877827, @kib wrote:

In D38555#877823, @dchagin wrote:

better (beauty) naming, thanks)

Um, I mean that you should add your P_OSREL value to sys/param.h

sure? P_OSREL is under _KERNEL, thats why I do not do it

[dchagin]

_WANT_OSREL use

[kib]

lib/libc/gen/sched_getaffinity.c

37

I would move this definition into libc_private.h, and add a comment explaining why we hardcode the value there.

[dchagin]

done, may be put _PID_MAX under _WANT_P_OSREL condition?

[kib]

In D38555#878467, @dchagin wrote:

done, may be put _PID_MAX under _WANT_P_OSREL condition?

No, they are unrelated.

lib/libc/include/libc_private.h

48

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