Re: Controlling subsystem power using APM

From: Thomas Hood (
Date: Sat Oct 14 2000 - 23:31:13 EST

> Linux aesthetics disaproves of no-value-added definitions like
> +struct apm_get_power_state_inparms {
> + unsigned short dev_id;
> +};

This is included for reasons of symmetry---it is
one of the components of a union.

> and in the code you present, rtnval seems redundant,
> since user-level can look at errno to see whether the
> ioctl succeeded.

rtnval is the APM BIOS return code whereas errno
is the ioctl return code.


Thomas Hood
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