[PATCH v7 1/6] riscv: Add Linux hwprobe syscall support

[Florian Weimer]

* Evan Green:

> diff --git a/sysdeps/unix/sysv/linux/riscv/hwprobe.c b/sysdeps/unix/sysv/linux/riscv/hwprobe.c
> new file mode 100644
> index 0000000000..f2dc46cfd7
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/riscv/hwprobe.c
> @@ -0,0 +1,39 @@

> +int __riscv_hwprobe (struct riscv_hwprobe *__pairs, size_t __pair_count,
> +		     size_t __cpu_count, unsigned long int *__cpus,
> +		     unsigned int __flags)
> +{
> +  int r;
> +
> +  r = INTERNAL_SYSCALL_CALL (riscv_hwprobe, 5, __pairs, __pair_count,
> +                             __cpu_count, __cpus, __flags);
> +
> +  /* Negate negative errno values to match pthreads API. */
> +  if (r < 0)
> +    r = -r;
> +
> +  return r;
> +}

I would expect:

+  /* Positive errno values to match pthreads API. */
+  return -r;

If the kernel ever returns positive values, the if condition won't save
us.

Thanks,
Florian