acpi_battery_sysctl
&acpi_battery_battinfo.cap, 0, acpi_battery_sysctl, "I",
&acpi_battery_battinfo.min, 0, acpi_battery_sysctl, "I",
&acpi_battery_battinfo.state, 0, acpi_battery_sysctl, "I",
static int acpi_battery_sysctl(SYSCTL_HANDLER_ARGS);