LinuxKPI: Add compat_ptr_ioctl

[siri_racha.ca]

Summary

Added compat_ptr_ioctl, it's required by amdkfd https://github.com/torvalds/linux/blob/0e35b9b6ec0ffcc5e23cbdec09f5c622ad532b53/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c#L60

[dumbbell]

sys/compat/linuxkpi/common/include/linux/fs.h

438–441

I would swap the logic like this:

if (unlocked_ioctl == NULL)

return (-ENOIOCTLCMD);

return (file->...);

439

arg is already an unsigned long, the cast is not needed.

[siri_racha.ca]

Updated function

[siri_racha.ca]

sys/compat/linuxkpi/common/include/linux/fs.h

438–441

Done/Amended