centos man page for acpi_bus_scan

ACPI_BUS_SCAN(9)					   Device drivers infrastructure					  ACPI_BUS_SCAN(9)

NAME
       acpi_bus_scan - Add ACPI device node objects in a given namespace scope.

SYNOPSIS
       int acpi_bus_scan(acpi_handle handle);

ARGUMENTS
       handle
	   Root of the namespace scope to scan.

DESCRIPTION
       Scan a given ACPI tree (probably recently hot-plugged) and create and add found devices.

       If no devices were found, -ENODEV is returned, but it does not mean that there has been a real error. There just have been no suitable ACPI
       objects in the table trunk from which the kernel could create a device and add an appropriate driver.

       Must be called under acpi_scan_lock.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							  ACPI_BUS_SCAN(9)