[PATCH 6/7] linux: Refactor sched_getcpu in terms of getcpu

[Florian Weimer]

* Adhemerval Zanella:

> diff --git a/sysdeps/unix/sysv/linux/sched_getcpu.c b/sysdeps/unix/sysv/linux/sched_getcpu.c
> index 65dd9fdda7..3646c8b713 100644
> --- a/sysdeps/unix/sysv/linux/sched_getcpu.c
> +++ b/sysdeps/unix/sysv/linux/sched_getcpu.c
> @@ -17,23 +17,11 @@
>  
>  #include <errno.h>
>  #include <sched.h>
> -#include <sysdep.h>
> -
> -#ifdef HAVE_GETCPU_VSYSCALL
> -# define HAVE_VSYSCALL
> -#endif
> -#include <sysdep-vdso.h>
>  
>  int
>  sched_getcpu (void)
>  {
> -#ifdef __NR_getcpu
>    unsigned int cpu;
> -  int r = INLINE_VSYSCALL (getcpu, 3, &cpu, NULL, NULL);
> -
> +  int r = __getcpu (&cpu, NULL);
>    return r == -1 ? r : cpu;
> -#else
> -  __set_errno (ENOSYS);
> -  return -1;
> -#endif
>  }

I wonder if the current state is a useful performance optimization.