Re: I.1 - System calls - ioctl

Arnd Bergmann
2009-07-30T16:41:56Z

On Thursday 30 July 2009, stephane eranian wrote:
> long sys_perf_counter_open(
> struct perf_counter_attr *attr,
> enum perf_target_type target_type,
> int target_id,
> int group_fd,
> unsigned long flags);
>
> Which is what you had, except without the struct.
>
> Then, it boils down to whether expressing a target id in 32 bits is enough.
> Obviously, 64-bit would be the safest but then I understand this causes issues
> on 32-bit systems.

Just make it an unsigned long then, that still covers all cases
where you only need the 64-bit type on 64-bit systems.