CONFIG_CHSC_SCH is not available for the selected architecture x86.
Result is shown for architecture s390

Support for CHSC subchannels

modulename: chsc_sch.ko

configname: CONFIG_CHSC_SCH

Linux Kernel Configuration
└─>I/O subsystem
└─>Support for CHSC subchannels
In linux kernel since version 2.6.27 (release Date: 2008-10-09)
This driver allows usage of CHSC subchannels. A CHSC subchannel
is usually present on LPAR only.
The driver creates a device /dev/chsc, which may be used to
obtain I/O configuration information about the machine and
to issue asynchronous chsc commands (DANGEROUS).
You will usually only want to use this interface on a special
LPAR designated for system management.

To compile this driver as a module, choose M here: the
module will be called chsc_sch.

If unsure, say N.
source code: